Question

What is the value of the expression 5n2+5n-2 when n= -2?

Answer 1

Step-by-step explanation:

5n2+5n-2

where n = - 2

5(-2) + 5(-2) -2

5 into -2 = -10 (plus) 5 into -2 = -10 (minus) 2

now,

-10 + (-10) -2

= -10 -10 -2

= -20 -2

= -22

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Answer 2

Answer:

Given expression :

$5 {n}^{2} + 5n - 2$

Now, n = -2

$5 {( - 2)}^{2} + 5( - 2) - 2 \\ = 5(4) + 5( - 2) - 2 \\ = 20 - 10 - 2 \\ = 20 - 12 \\ = \boxed{ 8}$

• 8 is the right answer.