The perimeter (distance around the shape) of a rectangle is 40 cm. The length is 14 cm.
1 answer:
You might be interested in
We are given :
Step 1: factor the part inside square root
The function given inside square root is of quadratic form.
So let us try to factorise it using AC method.
Here A*C = 4*25 = 100
so we have to find factors of 100 that add up to give -20.
the two factors are -10 and -10.
Rewriting the function :
=
=
=
Step 2:
Now we take square root of the factorised form
=
Answer : (2x-5)
We start with 
for 
. 
Yes. This is true.