Question

if x = -2,then find the value of the following :
i)3x-8
ii)3x²+11x ​

Answer 1

Answer:

i) -14 , ii) -10

Step-by-step explanation:

i) 3x-8

= 3×-2-8

= -6-8

= -14

ii)3x^2+11x

= 3×-2^2+11×-2

= 3×-2×-2+11×-2

= 3×4+11×-2

= 12+(-22)

= 12-22

= -10