Question

(iv) (a - b)(b - c) for a= 2, b=-5, c= -8
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Answer 1

Answer:

(2-5){5-(-8)}

(2-5)(5+8)

(-3)×13

-39 ans..

Step-by-step explanation:

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Answer 2

Answer:

$(a - b)(b - c) \\ ab - ac - b {}^{2} + bc \\ \\ putting \: value \: of \: a \: b \: and \: c \\ 2 \times ( - 5) - 2 \times ( - 8) - { (- 5}^{2} ) + ( - 5) \times ( - 8) \\ \\ - 10 + 16 - 25 + 40= 21$