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Simplifying
4x2 + 0x + -30 = 0
Anything times zero is zero.
4x2 + 0x + -30 = 0
Reorder the terms:
0 + -30 + 4x2 = 0
Combine like terms: 0 + -30 = -30
-30 + 4x2 = 0
Solving
-30 + 4x2 = 0
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 = 0 + 30
Combine like terms: -30 + 30 = 0
0 + 4x2 = 0 + 30
4x2 = 0 + 30
Combine like terms: 0 + 30 = 30
4x2 = 30
Divide each side by '4'.
x2 = 7.5
Simplifying
x2 = 7.5
Take the square root of each side:
x = {-2.738612788, 2.738612788}
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