Question

Answer these please correct ​

Answer 1

Step-by-step explanation:

a) 3x (4x-5) = 12X^2 - 15X

i) x= 3

12× 3^2 -15 × 3= 108- 15 = 93

ii). x= 1/2

12 ×(1/2)^2 -15× 1÷2 = 12÷4 - 15 ÷2

= 3- 15÷2 = (6-15)÷2 = - 9÷2

2)

i ) a = 0

ans = 5

at a = 1

ans=8

at a=-1

ans= 4