njahierica
njahierica njahierica
  • 08-05-2018
  • Mathematics
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How do I do this ??

How do I do this class=

Respuesta :

bnm1715bnm1715 bnm1715bnm1715
  • 08-05-2018
 the answer is b.) -12x^3+28x^2
Answer Link
wolfbunny0919
wolfbunny0919 wolfbunny0919
  • 08-05-2018
-4x^2 * 3x = -12x^3
-4x^2 *-7 = +28x^2
So since you can’t add them together the answer is the second one
Answer Link

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