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Simplifying
(5 + -7x)(5 + 7x) = 0
Multiply (5 + -7x) * (5 + 7x)
(5(5 + 7x) + -7x * (5 + 7x)) = 0
((5 * 5 + 7x * 5) + -7x * (5 + 7x)) = 0
((25 + 35x) + -7x * (5 + 7x)) = 0
(25 + 35x + (5 * -7x + 7x * -7x)) = 0
(25 + 35x + (-35x + -49x2)) = 0
Combine like terms: 35x + -35x = 0
(25 + 0 + -49x2) = 0
(25 + -49x2) = 0
Solving
25 + -49x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-25' to each side of the equation.
25 + -25 + -49x2 = 0 + -25
Combine like terms: 25 + -25 = 0
0 + -49x2 = 0 + -25
-49x2 = 0 + -25
Combine like terms: 0 + -25 = -25
-49x2 = -25
Divide each side by '-49'.
x2 = 0.5102040816
Simplifying
x2 = 0.5102040816
Take the square root of each side:
x = {-0.714285714, 0.714285714}
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