Question

IV) Solve the following:
i) Simplify:
3x (4x - 5) + 3, if x=3 and x
= 1/2​

Answer 1

Step-by-step explanation:

3x(4x-5) + 3

12x^2 - 15x + 3

at x = 3

12(3)^2 - 15(3) + 3

108 - 45 + 3

66

at x = 1/2

3 - 15/2 + 2

6 - 15 + 4/2

-5/2