Question

For the polynomial mx² − 2x + 3 if p(−1) = 7 then find m.

Answer 1

Let p(x) = mx² − 2x + 3

∴ p(−1) = 7

⇒ m × (−1)² − 2 × (−1) + 3 = 7

⇒ m + 2 + 3 = 7

⇒ m = 7 − 5 = 2

Thus the value of m is 2.