Question

if a - 10 evaluate a2 + 8a ​

Answer 1

a  

2

+8a

The value of a  2 +8a for a=−10 is calculated as follows,

a  

2

+8a=(−10)  

2

+8×(−10)  

=100−80  

=20  

Therefore , the value of a  

2

+8a for a=−10 is 20

Answer 2

As per the data given in the question,

We have to determine the value of the expression - $a^2+8a$

As per question,

It is given that,

$a - 10\\=> a = 10$

So, for determining the value of given expression,

We will put the value of "a" in the above expression.

So, we will get it as,

$a^2+8a =10^2+(8\times 10)\\=100+80\\ = 180$

Hence, value of the expression will be 180.