Question

How do you combine like terms in `7x ^ { 2} - 7x + 5+ 4x ^ { 2} + 9x - 6`?

Answer 1

`11x^2+2x-1`

Explanation:

Identify the like terms first and then combine them.

#color(blue)(7x^2)" " color(red)(-7x)" " color(green)(+5)" "color(blue)(+4x^2) " " color(red)(+9x)" " color(green)(-" "6)#

#=color(blue)(7x^2)" " color(blue)(+4x^2)" " color(red)(-7x)" " color(red)(+9x)" "color(green)(+5)" "color(green)(-" "6)#

`=color(blue)(11x^2)" " color(red)(+2x)" " color(green)(-1)`