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Simplifying
4x2 + -16 + -9 = 0
Reorder the terms:
-16 + -9 + 4x2 = 0
Combine like terms: -16 + -9 = -25
-25 + 4x2 = 0
Solving
-25 + 4x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '25' to each side of the equation.
-25 + 25 + 4x2 = 0 + 25
Combine like terms: -25 + 25 = 0
0 + 4x2 = 0 + 25
4x2 = 0 + 25
Combine like terms: 0 + 25 = 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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