(5x^2+9x-1)+(4x^2+4x+10)-(9x^2-12)=

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Solution for (5x^2+9x-1)+(4x^2+4x+10)-(9x^2-12)= equation:


Simplifying
(5x2 + 9x + -1) + (4x2 + 4x + 10) + -1(9x2 + -12) = 0

Reorder the terms:
(-1 + 9x + 5x2) + (4x2 + 4x + 10) + -1(9x2 + -12) = 0

Remove parenthesis around (-1 + 9x + 5x2)
-1 + 9x + 5x2 + (4x2 + 4x + 10) + -1(9x2 + -12) = 0

Reorder the terms:
-1 + 9x + 5x2 + (10 + 4x + 4x2) + -1(9x2 + -12) = 0

Remove parenthesis around (10 + 4x + 4x2)
-1 + 9x + 5x2 + 10 + 4x + 4x2 + -1(9x2 + -12) = 0

Reorder the terms:
-1 + 9x + 5x2 + 10 + 4x + 4x2 + -1(-12 + 9x2) = 0
-1 + 9x + 5x2 + 10 + 4x + 4x2 + (-12 * -1 + 9x2 * -1) = 0
-1 + 9x + 5x2 + 10 + 4x + 4x2 + (12 + -9x2) = 0

Reorder the terms:
-1 + 10 + 12 + 9x + 4x + 5x2 + 4x2 + -9x2 = 0

Combine like terms: -1 + 10 = 9
9 + 12 + 9x + 4x + 5x2 + 4x2 + -9x2 = 0

Combine like terms: 9 + 12 = 21
21 + 9x + 4x + 5x2 + 4x2 + -9x2 = 0

Combine like terms: 9x + 4x = 13x
21 + 13x + 5x2 + 4x2 + -9x2 = 0

Combine like terms: 5x2 + 4x2 = 9x2
21 + 13x + 9x2 + -9x2 = 0

Combine like terms: 9x2 + -9x2 = 0
21 + 13x + 0 = 0
21 + 13x = 0

Solving
21 + 13x = 0

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 13x = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 13x = 0 + -21
13x = 0 + -21

Combine like terms: 0 + -21 = -21
13x = -21

Divide each side by '13'.
x = -1.615384615

Simplifying
x = -1.615384615

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