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Simplifying
(7 + -3x)(7 + 3x) = 0
Multiply (7 + -3x) * (7 + 3x)
(7(7 + 3x) + -3x * (7 + 3x)) = 0
((7 * 7 + 3x * 7) + -3x * (7 + 3x)) = 0
((49 + 21x) + -3x * (7 + 3x)) = 0
(49 + 21x + (7 * -3x + 3x * -3x)) = 0
(49 + 21x + (-21x + -9x2)) = 0
Combine like terms: 21x + -21x = 0
(49 + 0 + -9x2) = 0
(49 + -9x2) = 0
Solving
49 + -9x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-49' to each side of the equation.
49 + -49 + -9x2 = 0 + -49
Combine like terms: 49 + -49 = 0
0 + -9x2 = 0 + -49
-9x2 = 0 + -49
Combine like terms: 0 + -49 = -49
-9x2 = -49
Divide each side by '-9'.
x2 = 5.444444444
Simplifying
x2 = 5.444444444
Take the square root of each side:
x = {-2.333333333, 2.333333333}
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