=(9x-2)(7x+9)

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Solution for =(9x-2)(7x+9) equation:


Simplifying
0 = (9x + -2)(7x + 9)

Reorder the terms:
0 = (-2 + 9x)(7x + 9)

Reorder the terms:
0 = (-2 + 9x)(9 + 7x)

Multiply (-2 + 9x) * (9 + 7x)
0 = (-2(9 + 7x) + 9x * (9 + 7x))
0 = ((9 * -2 + 7x * -2) + 9x * (9 + 7x))
0 = ((-18 + -14x) + 9x * (9 + 7x))
0 = (-18 + -14x + (9 * 9x + 7x * 9x))
0 = (-18 + -14x + (81x + 63x2))

Combine like terms: -14x + 81x = 67x
0 = (-18 + 67x + 63x2)

Solving
0 = -18 + 67x + 63x2

Solving for variable 'x'.

Combine like terms: 0 + 18 = 18
18 + -67x + -63x2 = -18 + 67x + 63x2 + 18 + -67x + -63x2

Reorder the terms:
18 + -67x + -63x2 = -18 + 18 + 67x + -67x + 63x2 + -63x2

Combine like terms: -18 + 18 = 0
18 + -67x + -63x2 = 0 + 67x + -67x + 63x2 + -63x2
18 + -67x + -63x2 = 67x + -67x + 63x2 + -63x2

Combine like terms: 67x + -67x = 0
18 + -67x + -63x2 = 0 + 63x2 + -63x2
18 + -67x + -63x2 = 63x2 + -63x2

Combine like terms: 63x2 + -63x2 = 0
18 + -67x + -63x2 = 0

Factor a trinomial.
(2 + -9x)(9 + 7x) = 0

Subproblem 1

Set the factor '(2 + -9x)' equal to zero and attempt to solve: Simplifying 2 + -9x = 0 Solving 2 + -9x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -9x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -9x = 0 + -2 -9x = 0 + -2 Combine like terms: 0 + -2 = -2 -9x = -2 Divide each side by '-9'. x = 0.2222222222 Simplifying x = 0.2222222222

Subproblem 2

Set the factor '(9 + 7x)' equal to zero and attempt to solve: Simplifying 9 + 7x = 0 Solving 9 + 7x = 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 + 7x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 7x = 0 + -9 7x = 0 + -9 Combine like terms: 0 + -9 = -9 7x = -9 Divide each side by '7'. x = -1.285714286 Simplifying x = -1.285714286

Solution

x = {0.2222222222, -1.285714286}

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