Question

8. Simplify the following expressions and find their values when a =
a = -1, b = -2
(i) 2a - 2b - 4 - 5 + a
(ii) 2(a2 + ab) + 3 - ab.​

Answer 1

Step-by-step explanation:

1. 2×-1 -2×-2 -4 -5-1

• -2+4-4-5-1
• -8

2. 2{-1×2+(-1×-2)}+3-(-1×-2)

2{-2+2}+3-2

2{0}+3-2

1

Answer 2

Answer:

(i)-8

(ii)7

Step-by-step explanation:

(i)2(-1)-2(-2)-4-5-1=-2+4-4-5-1=-8

(ii)2(-1*-1+-1-2)+3-2=2(3)+3-2=6+3-2=7