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Simplifying
2x2 + 7 = 20
Reorder the terms:
7 + 2x2 = 20
Solving
7 + 2x2 = 20
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-7' to each side of the equation.
7 + -7 + 2x2 = 20 + -7
Combine like terms: 7 + -7 = 0
0 + 2x2 = 20 + -7
2x2 = 20 + -7
Combine like terms: 20 + -7 = 13
2x2 = 13
Divide each side by '2'.
x2 = 6.5
Simplifying
x2 = 6.5
Take the square root of each side:
x = {-2.549509757, 2.549509757}
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