(2x-1)(7x+9)=0

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Solution for (2x-1)(7x+9)=0 equation:


Simplifying
(2x + -1)(7x + 9) = 0

Reorder the terms:
(-1 + 2x)(7x + 9) = 0

Reorder the terms:
(-1 + 2x)(9 + 7x) = 0

Multiply (-1 + 2x) * (9 + 7x)
(-1(9 + 7x) + 2x * (9 + 7x)) = 0
((9 * -1 + 7x * -1) + 2x * (9 + 7x)) = 0
((-9 + -7x) + 2x * (9 + 7x)) = 0
(-9 + -7x + (9 * 2x + 7x * 2x)) = 0
(-9 + -7x + (18x + 14x2)) = 0

Combine like terms: -7x + 18x = 11x
(-9 + 11x + 14x2) = 0

Solving
-9 + 11x + 14x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-9 + -7x)(1 + -2x) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(1 + -2x)' equal to zero and attempt to solve: Simplifying 1 + -2x = 0 Solving 1 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -2x = 0 + -1 -2x = 0 + -1 Combine like terms: 0 + -1 = -1 -2x = -1 Divide each side by '-2'. x = 0.5 Simplifying x = 0.5

Solution

x = {-1.285714286, 0.5}

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