Without actually performing the operations, determine mentally the coefficient of the x²-term in the simplified form of the following expression. (-5²+3x-4) - (-2x²+x-3) + (-9x²+2x-5). the coefficient of the x²-term i really need with this one i'm stuck.

-7

Step-by-step explanation:

Because there is no multiplication, it is just the x^2 terms. There is a -(-2x^2) and a -9x^2, so it is 2x^2 and -9x^2 or -7x^2, so the coefficient is -7.

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3