(7x+5)(-7x-2)=3(7x+5)

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Solution for (7x+5)(-7x-2)=3(7x+5) equation:


Simplifying
(7x + 5)(-7x + -2) = 3(7x + 5)

Reorder the terms:
(5 + 7x)(-7x + -2) = 3(7x + 5)

Reorder the terms:
(5 + 7x)(-2 + -7x) = 3(7x + 5)

Multiply (5 + 7x) * (-2 + -7x)
(5(-2 + -7x) + 7x * (-2 + -7x)) = 3(7x + 5)
((-2 * 5 + -7x * 5) + 7x * (-2 + -7x)) = 3(7x + 5)
((-10 + -35x) + 7x * (-2 + -7x)) = 3(7x + 5)
(-10 + -35x + (-2 * 7x + -7x * 7x)) = 3(7x + 5)
(-10 + -35x + (-14x + -49x2)) = 3(7x + 5)

Combine like terms: -35x + -14x = -49x
(-10 + -49x + -49x2) = 3(7x + 5)

Reorder the terms:
-10 + -49x + -49x2 = 3(5 + 7x)
-10 + -49x + -49x2 = (5 * 3 + 7x * 3)
-10 + -49x + -49x2 = (15 + 21x)

Solving
-10 + -49x + -49x2 = 15 + 21x

Solving for variable 'x'.

Reorder the terms:
-10 + -15 + -49x + -21x + -49x2 = 15 + 21x + -15 + -21x

Combine like terms: -10 + -15 = -25
-25 + -49x + -21x + -49x2 = 15 + 21x + -15 + -21x

Combine like terms: -49x + -21x = -70x
-25 + -70x + -49x2 = 15 + 21x + -15 + -21x

Reorder the terms:
-25 + -70x + -49x2 = 15 + -15 + 21x + -21x

Combine like terms: 15 + -15 = 0
-25 + -70x + -49x2 = 0 + 21x + -21x
-25 + -70x + -49x2 = 21x + -21x

Combine like terms: 21x + -21x = 0
-25 + -70x + -49x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(25 + 70x + 49x2) = 0

Factor a trinomial.
-1((5 + 7x)(5 + 7x)) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(5 + 7x)' equal to zero and attempt to solve: Simplifying 5 + 7x = 0 Solving 5 + 7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 7x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 7x = 0 + -5 7x = 0 + -5 Combine like terms: 0 + -5 = -5 7x = -5 Divide each side by '7'. x = -0.7142857143 Simplifying x = -0.7142857143

Subproblem 2

Set the factor '(5 + 7x)' equal to zero and attempt to solve: Simplifying 5 + 7x = 0 Solving 5 + 7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 7x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 7x = 0 + -5 7x = 0 + -5 Combine like terms: 0 + -5 = -5 7x = -5 Divide each side by '7'. x = -0.7142857143 Simplifying x = -0.7142857143

Solution

x = {-0.7142857143, -0.7142857143}

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