(x+7)(x-4)=26

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Solution for (x+7)(x-4)=26 equation:


Simplifying
(x + 7)(x + -4) = 26

Reorder the terms:
(7 + x)(x + -4) = 26

Reorder the terms:
(7 + x)(-4 + x) = 26

Multiply (7 + x) * (-4 + x)
(7(-4 + x) + x(-4 + x)) = 26
((-4 * 7 + x * 7) + x(-4 + x)) = 26
((-28 + 7x) + x(-4 + x)) = 26
(-28 + 7x + (-4 * x + x * x)) = 26
(-28 + 7x + (-4x + x2)) = 26

Combine like terms: 7x + -4x = 3x
(-28 + 3x + x2) = 26

Solving
-28 + 3x + x2 = 26

Solving for variable 'x'.

Reorder the terms:
-28 + -26 + 3x + x2 = 26 + -26

Combine like terms: -28 + -26 = -54
-54 + 3x + x2 = 26 + -26

Combine like terms: 26 + -26 = 0
-54 + 3x + x2 = 0

Factor a trinomial.
(-9 + -1x)(6 + -1x) = 0

Subproblem 1

Set the factor '(-9 + -1x)' equal to zero and attempt to solve: Simplifying -9 + -1x = 0 Solving -9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -1x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1x = 0 + 9 -1x = 0 + 9 Combine like terms: 0 + 9 = 9 -1x = 9 Divide each side by '-1'. x = -9 Simplifying x = -9

Subproblem 2

Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6

Solution

x = {-9, 6}

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