• Math

  Class-7 : Algebraic expressions

  Posted by Rahul on June 23, 2023 at 5:53 pm

  Find the value of the expression when n=-2

  -n^3+5n^2-1

  Nilanjana replied 10 months, 1 week ago 2 Members · 1 Reply

  • algebra
• 1 Reply

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  Nilanjana

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  June 23, 2023 at 6:11 pm

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  if n = -2, then we shall put the value of n in the given expression. Putting the value of n, we get

  -(-2)^3 + 5(-2)^2 -1

  = -(-8) + (5*4) – 1

  = 8 + 20 – 1

  = 27

  Therefore, the answer is 27.

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