Question

Let m(x)=3x2−2x−5. What is the value of m(−2)?

Answer 1

m(- 2) = 11

Explanation:

Substitute x = - 2 into m(x) , that is

m(- 2) = 3(- 2)² - 2(- 2) - 5

= 3(4) + 4 - 5

= 12 + 4 - 5

= 11

Answer 2

5

Explanation:

m(-2) = 3x2 - 2x(-2) -5 = 6 + 4 - 5 = 5