Question

Given that y=18 + 3x² (i) find the value of y when x= -2

Answer 1

y= 6

Explanation:

substitute x= -2 in the equation y=18+3x^2

from there you'll get your final answer

Answer 2

y=30

Explanation:

f(-2)=18+3(-2)^2

f(-2)=18+3*4

f(-2)=18+12

f(-2)=30