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Simplifying
4x2 + 4x2 + -15 = 0
Reorder the terms:
-15 + 4x2 + 4x2 = 0
Combine like terms: 4x2 + 4x2 = 8x2
-15 + 8x2 = 0
Solving
-15 + 8x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '15' to each side of the equation.
-15 + 15 + 8x2 = 0 + 15
Combine like terms: -15 + 15 = 0
0 + 8x2 = 0 + 15
8x2 = 0 + 15
Combine like terms: 0 + 15 = 15
8x2 = 15
Divide each side by '8'.
x2 = 1.875
Simplifying
x2 = 1.875
Take the square root of each side:
x = {-1.369306394, 1.369306394}
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