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Simplifying
3x2 + -7 + -4 = 20
Reorder the terms:
-7 + -4 + 3x2 = 20
Combine like terms: -7 + -4 = -11
-11 + 3x2 = 20
Solving
-11 + 3x2 = 20
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '11' to each side of the equation.
-11 + 11 + 3x2 = 20 + 11
Combine like terms: -11 + 11 = 0
0 + 3x2 = 20 + 11
3x2 = 20 + 11
Combine like terms: 20 + 11 = 31
3x2 = 31
Divide each side by '3'.
x2 = 10.33333333
Simplifying
x2 = 10.33333333
Take the square root of each side:
x = {-3.214550253, 3.214550253}
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