7-4x^2=-18

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Solution for 7-4x^2=-18 equation: 


Simplifying
7 + -4x2 = -18

Solving
7 + -4x2 = -18

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 + -4x2 = -18 + -7

Combine like terms: 7 + -7 = 0
0 + -4x2 = -18 + -7
-4x2 = -18 + -7

Combine like terms: -18 + -7 = -25
-4x2 = -25

Divide each side by '-4'.
x2 = 6.25

Simplifying
x2 = 6.25

Take the square root of each side:
x = {-2.5, 2.5}

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