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Simplifying
7x2 + -20 + 12 = 0
Reorder the terms:
-20 + 12 + 7x2 = 0
Combine like terms: -20 + 12 = -8
-8 + 7x2 = 0
Solving
-8 + 7x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '8' to each side of the equation.
-8 + 8 + 7x2 = 0 + 8
Combine like terms: -8 + 8 = 0
0 + 7x2 = 0 + 8
7x2 = 0 + 8
Combine like terms: 0 + 8 = 8
7x2 = 8
Divide each side by '7'.
x2 = 1.142857143
Simplifying
x2 = 1.142857143
Take the square root of each side:
x = {-1.069044968, 1.069044968}
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