Question

How much is 21a3 – 17a2 less than 89a3 – 64a2 + 6a + 16?​

Answer 1

Answer:

68a3-47a2+6a+16

Step-by-step explanation:

Let the given polynomial is less than the other by x

According to question,

21a3−17a2+x=89a3−64a2+6a+16

⇒x=(89a3−64a2+6a+16)−(21a3−17a2)

⇒x=89a3−64a2+6a+16−21a3+17a2

Collecting like terms,

⇒x=89a3−21a3−64a2+17a2+6a+16

⇒x=68a3−47a2+6a+16