-4x^2+16=21

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Solution for -4x^2+16=21 equation:


Simplifying
-4x2 + 16 = 21

Reorder the terms:
16 + -4x2 = 21

Solving
16 + -4x2 = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-16' to each side of the equation.
16 + -16 + -4x2 = 21 + -16

Combine like terms: 16 + -16 = 0
0 + -4x2 = 21 + -16
-4x2 = 21 + -16

Combine like terms: 21 + -16 = 5
-4x2 = 5

Divide each side by '-4'.
x2 = -1.25

Simplifying
x2 = -1.25

Reorder the terms:
1.25 + x2 = -1.25 + 1.25

Combine like terms: -1.25 + 1.25 = 0.00
1.25 + x2 = 0.00

The solution to this equation could not be determined.

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