Question

. Subtract b(b² + b – 7) +5 from 3b2 – 8 and find the value of expression obtained for b = -3.
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Answer 1

Step-by-step explanation:

Answer:

2b 2 −b 3 +7b−8

Step-by-step explanation:

If we subtract b(b 2 +b−7)+5 from 3b 2 −8 then we get, (3b 2 −8)−{b(b 2 +b−7)}

=2b 2 −b 3 +7b−8.

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