Question

y=3x²+x-2
x=5
????

Answer 1

u need to substitue in the x values ... ie:
y= 3(5)^2 + 5 -2
3(25) + 5 - 2
=78

Answer 2

find y by plugging in x=5

Answer 3

mr monk has done the work

Answer 4

oh ok, that seems easy enough thank you!

Answer 5

yw