Question

How do you simplify `(-18x^2 + 7x - 14) - (-20x^2 + 17x - 12)`?

Answer 1

`(-18x^2 +7x -14) - (-20x^2 +17x -12)`

`= -18x^2 +7x -14 +20x^2 -17x +12`

Here, we will first group like terms:

`=color(blue)((-18x^2 +20x^2)) + color(red)((7x - 17x)) +color(green)((-14+12))`

`=color(blue)(2x^2) color(red)(-10x) -color(green)(2)`