Question

evaluate 3(x-4)+2x-x2 for x=5

Answer 1

Answer:-12

Step-by-step explanation:

Im going to assume that x2 means x squared.  You can just substitute "x" for 5.  3(5-4)+2(5)-5^2.  First parenthesis equals 3(1)+10-5^2.  Then it equals 3+10-5^2.  So then it would be 13-5^2.  5^2 equals 25.  so it would be 13-25. Which equals -12.