Question

Find the value of following expression when n =2
a)5n2+5n-2
b)n2+5n2+5n2​

Answer 1

1.Hence, the value of the expression at n = 2 equals to 28. Therefore, the value of the expression (i) 5n – 2 and (ii) 5n2+5n−2 at n = 2 are 8 and 28 respectively.

2.Putting the value of n=−2, in 5n−2, we get,

(5)(−2)−2=−10−2=−12.

Answer 2

Step-by-step explanation:

a)12

b)44

by simply substituting values we get the answer