(3x^2+2x-4)+(5x^2+5x+18)-(8x^2-17)=

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Solution for (3x^2+2x-4)+(5x^2+5x+18)-(8x^2-17)= equation:


Simplifying
(3x2 + 2x + -4) + (5x2 + 5x + 18) + -1(8x2 + -17) = 0

Reorder the terms:
(-4 + 2x + 3x2) + (5x2 + 5x + 18) + -1(8x2 + -17) = 0

Remove parenthesis around (-4 + 2x + 3x2)
-4 + 2x + 3x2 + (5x2 + 5x + 18) + -1(8x2 + -17) = 0

Reorder the terms:
-4 + 2x + 3x2 + (18 + 5x + 5x2) + -1(8x2 + -17) = 0

Remove parenthesis around (18 + 5x + 5x2)
-4 + 2x + 3x2 + 18 + 5x + 5x2 + -1(8x2 + -17) = 0

Reorder the terms:
-4 + 2x + 3x2 + 18 + 5x + 5x2 + -1(-17 + 8x2) = 0
-4 + 2x + 3x2 + 18 + 5x + 5x2 + (-17 * -1 + 8x2 * -1) = 0
-4 + 2x + 3x2 + 18 + 5x + 5x2 + (17 + -8x2) = 0

Reorder the terms:
-4 + 18 + 17 + 2x + 5x + 3x2 + 5x2 + -8x2 = 0

Combine like terms: -4 + 18 = 14
14 + 17 + 2x + 5x + 3x2 + 5x2 + -8x2 = 0

Combine like terms: 14 + 17 = 31
31 + 2x + 5x + 3x2 + 5x2 + -8x2 = 0

Combine like terms: 2x + 5x = 7x
31 + 7x + 3x2 + 5x2 + -8x2 = 0

Combine like terms: 3x2 + 5x2 = 8x2
31 + 7x + 8x2 + -8x2 = 0

Combine like terms: 8x2 + -8x2 = 0
31 + 7x + 0 = 0
31 + 7x = 0

Solving
31 + 7x = 0

Solving for variable 'x'.

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

Add '-31' to each side of the equation.
31 + -31 + 7x = 0 + -31

Combine like terms: 31 + -31 = 0
0 + 7x = 0 + -31
7x = 0 + -31

Combine like terms: 0 + -31 = -31
7x = -31

Divide each side by '7'.
x = -4.428571429

Simplifying
x = -4.428571429

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