2(x-4)(x+7)=0

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


Simplifying
2(x + -4)(x + 7) = 0

Reorder the terms:
2(-4 + x)(x + 7) = 0

Reorder the terms:
2(-4 + x)(7 + x) = 0

Multiply (-4 + x) * (7 + x)
2(-4(7 + x) + x(7 + x)) = 0
2((7 * -4 + x * -4) + x(7 + x)) = 0
2((-28 + -4x) + x(7 + x)) = 0
2(-28 + -4x + (7 * x + x * x)) = 0
2(-28 + -4x + (7x + x2)) = 0

Combine like terms: -4x + 7x = 3x
2(-28 + 3x + x2) = 0
(-28 * 2 + 3x * 2 + x2 * 2) = 0
(-56 + 6x + 2x2) = 0

Solving
-56 + 6x + 2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-28 + 3x + x2) = 0

Factor a trinomial.
2((-7 + -1x)(4 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-7 + -1x)' equal to zero and attempt to solve: Simplifying -7 + -1x = 0 Solving -7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = 0 + 7 -1x = 0 + 7 Combine like terms: 0 + 7 = 7 -1x = 7 Divide each side by '-1'. x = -7 Simplifying x = -7

Subproblem 2

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-7, 4}

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