Answer:
-12
Step-by-step explanation:
3(x-4)+2x^2
when x =5 , sub 5 into x
3(5-4)+2(5)-(5)^2
=15-12+10-25
=-12
3(x-4)+2x-x^2 first you should eliminate the parentheses
3x-12+2x-x^2 now replace x for 5
3(5)-12+2(5)-(5)^2
15-12+10-25
