P(x) is a polynomial function. If P(x2)=(a−b+2)x3−2x2+(2a+b+7)x−20 , what is P(a+b) ?
2 Answers
Jun 20, 2016
Explanation:
If
The proposition is not feasible once defined
Jun 20, 2016
Explanation:
Since
So we require
Adding these two equations together, we get:
P(x2)=−2x2−20
So:
P(x)=−2x−20
Hence:
P(a+b)
=P((−3)+(−1))
=P(−4)
=−2(−4)−20
=8−20
=−12