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Simplifying
(11 + -7x)(11 + 7x) = 0
Multiply (11 + -7x) * (11 + 7x)
(11(11 + 7x) + -7x * (11 + 7x)) = 0
((11 * 11 + 7x * 11) + -7x * (11 + 7x)) = 0
((121 + 77x) + -7x * (11 + 7x)) = 0
(121 + 77x + (11 * -7x + 7x * -7x)) = 0
(121 + 77x + (-77x + -49x2)) = 0
Combine like terms: 77x + -77x = 0
(121 + 0 + -49x2) = 0
(121 + -49x2) = 0
Solving
121 + -49x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-121' to each side of the equation.
121 + -121 + -49x2 = 0 + -121
Combine like terms: 121 + -121 = 0
0 + -49x2 = 0 + -121
-49x2 = 0 + -121
Combine like terms: 0 + -121 = -121
-49x2 = -121
Divide each side by '-49'.
x2 = 2.469387755
Simplifying
x2 = 2.469387755
Take the square root of each side:
x = {-1.571428571, 1.571428571}
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