Question

Evalute 2n2 − 7n − 4 given n(n − 2) = 15.

Answer 1

n^2 - 2n - 15 = 0
(n-5)(n+3) = 0
n = 5 or - 3

2n2 − 7n − 4 = 50 - 35 -4 = 11 (when n = 5)
or
2n2 − 7n − 4 = 18 + 21 - 4 = 35

Answer 2

I need a larger number and smaller number