### Reformatting the entry :

Changes make to her input must not affect the solution: (1): "x2" was replaced by "x^2". 1 more similar replacement(s).

You are watching: What are the solutions of the equation x4 – 5x2 – 36 = 0? use factoring to solve.

## Step 1 :

Equation in ~ the end of action 1 :

((x4) + 5x2) - 36 = 0

## Step 2 :

Trying to variable by dividing the center term2.1Factoring x4+5x2-36 The very first term is, x4 its coefficient is 1.The center term is, +5x2 that is coefficient is 5.The last term, "the constant", is -36Step-1 : main point the coefficient the the an initial term by the continuous 1•-36=-36Step-2 : uncover two determinants of -36 who sum equals the coefficient the the middle term, i m sorry is 5.

 -36 + 1 = -35 -18 + 2 = -16 -12 + 3 = -9 -9 + 4 = -5 -6 + 6 = 0 -4 + 9 = 5 That"s it

Step-3 : Rewrite the polynomial dividing the middle term making use of the two components found in step2above, -4 and also 9x4 - 4x2+9x2 - 36Step-4 : include up the first 2 terms, pulling out choose factors:x2•(x2-4) include up the critical 2 terms, pulling out usual factors:9•(x2-4) Step-5:Add increase the four terms the step4:(x2+9)•(x2-4)Which is the desired factorization

### Polynomial root Calculator :

2.2 find roots (zeroes) of : F(x) = x2+9Polynomial root Calculator is a collection of approaches aimed in ~ finding values ofxfor which F(x)=0 Rational root Test is one of the over mentioned tools. It would certainly only find Rational Roots that is number x which can be expressed as the quotient of two integersThe Rational root Theorem says that if a polynomial zeroes because that a reasonable numberP/Q then p is a variable of the Trailing constant and Q is a variable of the top CoefficientIn this case, the leading Coefficient is 1 and the Trailing continuous is 9. The factor(s) are: that the leading Coefficient : 1of the Trailing consistent : 1 ,3 ,9 Let united state test ....

See more: What Is The Oxidation Number Of Elements In Group 17, Oxidation States Of Group 17 Elements

PQP/QF(P/Q)Divisor
-11 -1.00 10.00
-31 -3.00 18.00
-91 -9.00 90.00
11 1.00 10.00
31 3.00 18.00
91 9.00 90.00

Polynomial root Calculator uncovered no rational roots

Trying to variable as a difference of Squares:2.3 Factoring: x2-4 concept : A difference of two perfect squares, A2-B2can be factored right into (A+B)•(A-B)Proof:(A+B)•(A-B)= A2 - AB+BA-B2= A2 -AB+ abdominal - B2 = A2 - B2Note : ab = BA is the commutative building of multiplication. Note : -AB+ abdominal equals zero and is because of this eliminated indigenous the expression.Check: 4 is the square the 2Check: x2 is the square of x1Factorization is :(x + 2)•(x - 2)

Equation in ~ the finish of step 2 :

(x2 + 9) • (x + 2) • (x - 2) = 0

## Step 3 :

Theory - root of a product :3.1 A product of several terms equals zero.When a product of 2 or more terms equals zero, then at least one of the terms must be zero.We shall currently solve each term = 0 separatelyIn other words, we space going to resolve as numerous equations together there space terms in the productAny equipment of term = 0 solves product = 0 as well.

Solving a single Variable Equation:3.2Solve:x2+9 = 0Subtract 9 from both sides of the equation:x2 = -9 as soon as two things are equal, their square roots room equal. Acquisition the square root of the 2 sides that the equation us get: x = ± √ -9 In Math,iis called the imagine unit. That satisfies i2=-1. Both i and -i are the square root of -1Accordingly, √ -9 =√ -1•9= √-1•√ 9 =i•√ 9 deserve to √ 9 be simplified ?Yes!The prime factorization of 9is3•3 To be able to remove something indigenous under the radical, there need to be 2 instances of it (because we are taking a square i.e. Second root).√ 9 =√3•3 =±3 •√ 1 =±3 The equation has no actual solutions. It has actually 2 imaginary, or facility solutions.x= 0.0000 + 3.0000 i x= 0.0000 - 3.0000 ns

Solving a solitary Variable Equation:3.3Solve:x+2 = 0Subtract 2 indigenous both political parties of the equation:x = -2

Solving a single Variable Equation:3.4Solve:x-2 = 0Add 2 to both political parties of the equation:x = 2

### Supplement : fixing Quadratic Equation Directly

Solving x4+5x2-36 = 0 straight Earlier us factored this polynomial by separating the middle term. Let us now solve the equation by perfect The Square and also by using the Quadratic Formula

Solving a solitary Variable Equation:

Equations which are reducible to quadratic :

4.1Solvex4+5x2-36 = 0This equation is reducible to quadratic. What this way is that utilizing a new variable, we deserve to rewrite this equation as a quadratic equation making use of w, such that w = x2 transforms the equation into:w2+5w-36 = 0Solving this brand-new equation making use of the quadratic formula we gain two actual solutions: 4.0000or-9.0000Now that we recognize the value(s) of w, we have the right to calculate x due to the fact that x is √ w Doing simply this we find that the remedies of x4+5x2-36 = 0are either:x =√ 4.000 = 2.00000 or:x =√ 4.000 = -2.00000 or:x =√-9.000 = 0.0 + 3.00000 i or:x =√-9.000 = 0.0 - 3.00000 i