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Simplifying
2x2 + 10 = 21
Reorder the terms:
10 + 2x2 = 21
Solving
10 + 2x2 = 21
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-10' to each side of the equation.
10 + -10 + 2x2 = 21 + -10
Combine like terms: 10 + -10 = 0
0 + 2x2 = 21 + -10
2x2 = 21 + -10
Combine like terms: 21 + -10 = 11
2x2 = 11
Divide each side by '2'.
x2 = 5.5
Simplifying
x2 = 5.5
Take the square root of each side:
x = {-2.34520788, 2.34520788}
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