Question

what will be the value of p will the expression 16x + 2x² + 5p equal 50 at x = -3

Answer 1

-48+18+5p=50
-30+5p=50
5p=80
p=16

Answer 2

16(-3)+2(-3)(-3)+5p=50
so -48+18+5p=50
so 5p=80
and hence p=16