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Simplifying
10(x2 + 4) = 120
Reorder the terms:
10(4 + x2) = 120
(4 * 10 + x2 * 10) = 120
(40 + 10x2) = 120
Solving
40 + 10x2 = 120
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-40' to each side of the equation.
40 + -40 + 10x2 = 120 + -40
Combine like terms: 40 + -40 = 0
0 + 10x2 = 120 + -40
10x2 = 120 + -40
Combine like terms: 120 + -40 = 80
10x2 = 80
Divide each side by '10'.
x2 = 8
Simplifying
x2 = 8
Take the square root of each side:
x = {-2.828427125, 2.828427125}
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