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Simplifying
4x2 + 4 + -15 = 0
Reorder the terms:
4 + -15 + 4x2 = 0
Combine like terms: 4 + -15 = -11
-11 + 4x2 = 0
Solving
-11 + 4x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '11' to each side of the equation.
-11 + 11 + 4x2 = 0 + 11
Combine like terms: -11 + 11 = 0
0 + 4x2 = 0 + 11
4x2 = 0 + 11
Combine like terms: 0 + 11 = 11
4x2 = 11
Divide each side by '4'.
x2 = 2.75
Simplifying
x2 = 2.75
Take the square root of each side:
x = {-1.658312395, 1.658312395}
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