(7x+4)(x-9)=

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Solution for (7x+4)(x-9)= equation:


Simplifying
(7x + 4)(x + -9) = 0

Reorder the terms:
(4 + 7x)(x + -9) = 0

Reorder the terms:
(4 + 7x)(-9 + x) = 0

Multiply (4 + 7x) * (-9 + x)
(4(-9 + x) + 7x * (-9 + x)) = 0
((-9 * 4 + x * 4) + 7x * (-9 + x)) = 0
((-36 + 4x) + 7x * (-9 + x)) = 0
(-36 + 4x + (-9 * 7x + x * 7x)) = 0
(-36 + 4x + (-63x + 7x2)) = 0

Combine like terms: 4x + -63x = -59x
(-36 + -59x + 7x2) = 0

Solving
-36 + -59x + 7x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-4 + -7x)(9 + -1x) = 0

Subproblem 1

Set the factor '(-4 + -7x)' equal to zero and attempt to solve: Simplifying -4 + -7x = 0 Solving -4 + -7x = 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 + -7x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -7x = 0 + 4 -7x = 0 + 4 Combine like terms: 0 + 4 = 4 -7x = 4 Divide each side by '-7'. x = -0.5714285714 Simplifying x = -0.5714285714

Subproblem 2

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

Solution

x = {-0.5714285714, 9}

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