Question

Find the value of the expression 5n² + 5n -2 when n = -2?​

Answer 1

Answer:

8

Step-by-step explanation:

5n² + 5n -2=5(-2)² + 5(-2) -2=5(4) + (-10)-2=20-10-2=8

Answer 2

Answer:

Therefore, the value of the expression is 28.

Step-by-step explanation:

As per the data provided in the given question.

The given data is as follows.

The given is 5n² + 5n -2.

We will have to find the value of the expression as below

$5n^{2} +5n-2$ when $n=2$ .

We will substitute the value of n in the above equation.

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

At first, we will solve the brackets square of 2 is 4 in the above equation.

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

Now we will multiply 5 into 4 and 5 into 2

$=20+10-2$

Now adding 20 and 10

$=30-2$

Now subtracting 2 from 30

$=28$

Therefore, the value of the given expression is 28.