(2x^2+5x-5)+(4x^2+9x+12)-(6x^2-15)=

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Solution for (2x^2+5x-5)+(4x^2+9x+12)-(6x^2-15)= equation:


Simplifying
(2x2 + 5x + -5) + (4x2 + 9x + 12) + -1(6x2 + -15) = 0

Reorder the terms:
(-5 + 5x + 2x2) + (4x2 + 9x + 12) + -1(6x2 + -15) = 0

Remove parenthesis around (-5 + 5x + 2x2)
-5 + 5x + 2x2 + (4x2 + 9x + 12) + -1(6x2 + -15) = 0

Reorder the terms:
-5 + 5x + 2x2 + (12 + 9x + 4x2) + -1(6x2 + -15) = 0

Remove parenthesis around (12 + 9x + 4x2)
-5 + 5x + 2x2 + 12 + 9x + 4x2 + -1(6x2 + -15) = 0

Reorder the terms:
-5 + 5x + 2x2 + 12 + 9x + 4x2 + -1(-15 + 6x2) = 0
-5 + 5x + 2x2 + 12 + 9x + 4x2 + (-15 * -1 + 6x2 * -1) = 0
-5 + 5x + 2x2 + 12 + 9x + 4x2 + (15 + -6x2) = 0

Reorder the terms:
-5 + 12 + 15 + 5x + 9x + 2x2 + 4x2 + -6x2 = 0

Combine like terms: -5 + 12 = 7
7 + 15 + 5x + 9x + 2x2 + 4x2 + -6x2 = 0

Combine like terms: 7 + 15 = 22
22 + 5x + 9x + 2x2 + 4x2 + -6x2 = 0

Combine like terms: 5x + 9x = 14x
22 + 14x + 2x2 + 4x2 + -6x2 = 0

Combine like terms: 2x2 + 4x2 = 6x2
22 + 14x + 6x2 + -6x2 = 0

Combine like terms: 6x2 + -6x2 = 0
22 + 14x + 0 = 0
22 + 14x = 0

Solving
22 + 14x = 0

Solving for variable 'x'.

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

Add '-22' to each side of the equation.
22 + -22 + 14x = 0 + -22

Combine like terms: 22 + -22 = 0
0 + 14x = 0 + -22
14x = 0 + -22

Combine like terms: 0 + -22 = -22
14x = -22

Divide each side by '14'.
x = -1.571428571

Simplifying
x = -1.571428571

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