If a=5x^2+3x-7 and b=-3x^2-7x+5 find b-a

-8x^2-10x+12

Step-by-step explanation:

first set up the problem:

(-3x^2-7x+5) - (5x^2+3x-7)

Since you are subtracting you need to distribute the (-) sign:

(-3x^2-7x+5) (-5x^2-3x+7)

Now just combine like terms

-3x^2 + (-5x^2 = - 8x^2

(-7x + (-3x = - 10x

5+7 = 12

set answer in standard form:

-8x^2-10x+12