4x(3x^2+7x-5)=0

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Solution for 4x(3x^2+7x-5)=0 equation:


Simplifying
4x(3x2 + 7x + -5) = 0

Reorder the terms:
4x(-5 + 7x + 3x2) = 0
(-5 * 4x + 7x * 4x + 3x2 * 4x) = 0
(-20x + 28x2 + 12x3) = 0

Solving
-20x + 28x2 + 12x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4x'.
4x(-5 + 7x + 3x2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(-5 + 7x + 3x2)' equal to zero and attempt to solve: Simplifying -5 + 7x + 3x2 = 0 Solving -5 + 7x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -1.666666667 + 2.333333333x + x2 = 0 Move the constant term to the right: Add '1.666666667' to each side of the equation. -1.666666667 + 2.333333333x + 1.666666667 + x2 = 0 + 1.666666667 Reorder the terms: -1.666666667 + 1.666666667 + 2.333333333x + x2 = 0 + 1.666666667 Combine like terms: -1.666666667 + 1.666666667 = 0.000000000 0.000000000 + 2.333333333x + x2 = 0 + 1.666666667 2.333333333x + x2 = 0 + 1.666666667 Combine like terms: 0 + 1.666666667 = 1.666666667 2.333333333x + x2 = 1.666666667 The x term is 2.333333333x. Take half its coefficient (1.166666667). Square it (1.361111112) and add it to both sides. Add '1.361111112' to each side of the equation. 2.333333333x + 1.361111112 + x2 = 1.666666667 + 1.361111112 Reorder the terms: 1.361111112 + 2.333333333x + x2 = 1.666666667 + 1.361111112 Combine like terms: 1.666666667 + 1.361111112 = 3.027777779 1.361111112 + 2.333333333x + x2 = 3.027777779 Factor a perfect square on the left side: (x + 1.166666667)(x + 1.166666667) = 3.027777779 Calculate the square root of the right side: 1.740051085 Break this problem into two subproblems by setting (x + 1.166666667) equal to 1.740051085 and -1.740051085.

Subproblem 1

x + 1.166666667 = 1.740051085 Simplifying x + 1.166666667 = 1.740051085 Reorder the terms: 1.166666667 + x = 1.740051085 Solving 1.166666667 + x = 1.740051085 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = 1.740051085 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = 1.740051085 + -1.166666667 x = 1.740051085 + -1.166666667 Combine like terms: 1.740051085 + -1.166666667 = 0.573384418 x = 0.573384418 Simplifying x = 0.573384418

Subproblem 2

x + 1.166666667 = -1.740051085 Simplifying x + 1.166666667 = -1.740051085 Reorder the terms: 1.166666667 + x = -1.740051085 Solving 1.166666667 + x = -1.740051085 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = -1.740051085 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = -1.740051085 + -1.166666667 x = -1.740051085 + -1.166666667 Combine like terms: -1.740051085 + -1.166666667 = -2.906717752 x = -2.906717752 Simplifying x = -2.906717752

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.573384418, -2.906717752}

Solution

x = {0, 0.573384418, -2.906717752}

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