Question

Find the value of the expression (n3 +5n2 +5n-2) when n=-2.​

Answer 1

Answer:

-6-20+20

-6 is the answer ✅✅✅✅✅✅✅✅✅✅✅✅✅✅

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Answer 2

Given - Expression

Find - Value of expression

Solution - The mentioned expression is -

n³ + 5n² + 5n - 2

Keeping the formula of n in mentioned expression. The expression that will form is -

Value = ${( - 2)}^{3} + 5 { ( - 2)}^{2} + 5( - 2) - 2$

Finding cube and square of (-2) as per the requirement.

Value = $- 8 + 5(4) + 5( - 2) - 2$

Performing multiplication of respective brackets with their values.

Value = $- 8 + 20 - 10 - 2$

Performing addition and subtraction to find the value.

Value = -20+20

Value = 0

The value of given expression is 0.