How do you simplify $(4x^2 + 15x - 18) - (9x^2 - 5x + 19) - (-5x^2 + 18x - 20) - (-4x^2 - 7x + 15)$ ?

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Answer 1 · 2015-06-18T16:16:54

$=color(red)(4x^2 ) + color(blue)(9x) -32$

$4x^2 + 15x - 18- 9x^2 + 5x -19 +5x^2 - 18x +20 +4x^2 +7x -15$

Grouping like terms:
$color(red)((4x^2 -9x^2+5x^2 +4x^2 ) ) + color(blue)((15x+5x-18x+7x)) + (-18 -19+20 -15)$

$=color(red)(4x^2 ) +color(blue)(9x) -32$

How do you simplify (4x^2 + 15x - 18) - (9x^2 - 5x + 19) - (-5x^2 + 18x - 20) - (-4x^2 - 7x + 15)(4x^2 + 15x - 18) - (9x^2 - 5x + 19) - (-5x^2 + 18x - 20) - (-4x^2 - 7x + 15)?