Answer:heyyy there...the answer is b that is -12x^3+12x^2-20
Step-by-step explanation:
f(x)= -12x^3+19x^2-5
g(x)= 7x^2+15
f(x)-g(x)=(-12x^3+19x^2-5)-( 7x^2+15)...{while opening the bracket the sign of the second polynomial changes accordingly}
it becomes -12x^3+19x^2-5-7x^2-15
=-12x^3+12x^2-20
HOPE IT HELPED UUUU
