8x^2+21-9=0

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Solution for 8x^2+21-9=0 equation:


Simplifying
8x2 + 21 + -9 = 0

Reorder the terms:
21 + -9 + 8x2 = 0

Combine like terms: 21 + -9 = 12
12 + 8x2 = 0

Solving
12 + 8x2 = 0

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 8x2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 8x2 = 0 + -12
8x2 = 0 + -12

Combine like terms: 0 + -12 = -12
8x2 = -12

Divide each side by '8'.
x2 = -1.5

Simplifying
x2 = -1.5

Reorder the terms:
1.5 + x2 = -1.5 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
1.5 + x2 = 0.0

The solution to this equation could not be determined.

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