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Simplifying
4x2 + -30 = 20
Reorder the terms:
-30 + 4x2 = 20
Solving
-30 + 4x2 = 20
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '30' to each side of the equation.
-30 + 30 + 4x2 = 20 + 30
Combine like terms: -30 + 30 = 0
0 + 4x2 = 20 + 30
4x2 = 20 + 30
Combine like terms: 20 + 30 = 50
4x2 = 50
Divide each side by '4'.
x2 = 12.5
Simplifying
x2 = 12.5
Take the square root of each side:
x = {-3.535533906, 3.535533906}
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