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Simplifying
4x(3x) + 5 + -7 = 56
Remove parenthesis around (3x)
4x * 3x + 5 + -7 = 56
Reorder the terms for easier multiplication:
4 * 3x * x + 5 + -7 = 56
Multiply 4 * 3
12x * x + 5 + -7 = 56
Multiply x * x
12x2 + 5 + -7 = 56
Reorder the terms:
5 + -7 + 12x2 = 56
Combine like terms: 5 + -7 = -2
-2 + 12x2 = 56
Solving
-2 + 12x2 = 56
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '2' to each side of the equation.
-2 + 2 + 12x2 = 56 + 2
Combine like terms: -2 + 2 = 0
0 + 12x2 = 56 + 2
12x2 = 56 + 2
Combine like terms: 56 + 2 = 58
12x2 = 58
Divide each side by '12'.
x2 = 4.833333333
Simplifying
x2 = 4.833333333
Take the square root of each side:
x = {-2.198484326, 2.198484326}
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