Question

- 10
-
If a=-1 and b = 2, find :
(1) ab + ba (ii) a - ba
(iii) ab x ba (iv) abba​

Answer 1

Hii

you are welcome in my ans

ab + ba = -4

a - ba = 0

ab *ba = 4

abba = 4

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Hope it may helps you

Answer 2

Answer:

Step-by-step explanation:

→ a = -1

→ b = 2

→ (1) ab + ba

→ (-1)(2) + (2)(-1)

→ -2 + (-2)

→ -2 - 2

→ -4

→ (ii) a - ba

→ -1 - (2)(-1)

→ -1 - (-2)

→ -1 + 2

→ 1

→ (iii) ab × ba

→ (-1)(2) × (2)(-1)

→ -2 × (-2)

→ 4

→ (iv) abba

→ (-1)(2)(2)(-1)

→ 4