Plz meh on this
wil give brainliest

Let's factor a2−8a+16

a2−8a+16

The middle number is -8 and the last number is 16.

Factoring means we want something like

(a+_)(a+_)

Which numbers go in the blanks?

We need two numbers that...

Add together to get -8 Multiply together to get 16 Can you think of the two numbers?

Try -4 and -4:

-4+-4 = -8

-4*-4 = 16

Fill in the blanks in

(a+_)(a+_)

with -4 and -4 to get...

(a-4)(a-4)

(a−4)(a−4)

Use the distance formula: (x2-x1)^2 + (y2-y1)^2 and then square root your answer.
-2-(-5)=3
3-1=2
3^2+2^2=13
The square root of 13 cannot be broken down any further, therefore, you can leave your answer as square root of 13.