larryfought19 larryfought19
  • 19-04-2020
  • Mathematics
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maya167
maya167 maya167
  • 19-04-2020

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

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