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Simplifying
3x2 + -32 = 400
Reorder the terms:
-32 + 3x2 = 400
Solving
-32 + 3x2 = 400
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '32' to each side of the equation.
-32 + 32 + 3x2 = 400 + 32
Combine like terms: -32 + 32 = 0
0 + 3x2 = 400 + 32
3x2 = 400 + 32
Combine like terms: 400 + 32 = 432
3x2 = 432
Divide each side by '3'.
x2 = 144
Simplifying
x2 = 144
Take the square root of each side:
x = {-12, 12}
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