9x^2-1+4x^2+9=-21

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Solution for 9x^2-1+4x^2+9=-21 equation:


Simplifying
9x2 + -1 + 4x2 + 9 = -21

Reorder the terms:
-1 + 9 + 9x2 + 4x2 = -21

Combine like terms: -1 + 9 = 8
8 + 9x2 + 4x2 = -21

Combine like terms: 9x2 + 4x2 = 13x2
8 + 13x2 = -21

Solving
8 + 13x2 = -21

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -8 + 13x2 = -21 + -8

Combine like terms: 8 + -8 = 0
0 + 13x2 = -21 + -8
13x2 = -21 + -8

Combine like terms: -21 + -8 = -29
13x2 = -29

Divide each side by '13'.
x2 = -2.230769231

Simplifying
x2 = -2.230769231

Reorder the terms:
2.230769231 + x2 = -2.230769231 + 2.230769231

Combine like terms: -2.230769231 + 2.230769231 = 0.000000000
2.230769231 + x2 = 0.000000000

The solution to this equation could not be determined.

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