The value of c is 
Explanation:
Given that the trinomial is 
We need to determine the value of c such that the trinomial is a perfect square.
The value of c can be determined using the formula,

From the trinomial, the value of b is given by

Substituting the value of b in the above formula, we have,

Squaring both the numerator and denominator, we have,

Thus, the value of c is
which makes the trinomial a perfect square.
Answer:
Step by step explanation: OK so your question is 26.35×21.5 so that is pretty easy but if you do not know that you are in the right place so what you’re gonna do is if you have a calculator then you need to take that out if you don’t then I’m going to need a piece of paper now for me it’s easy because I have a calculator and you can find a calculator on your iPad your phone etc. but yeah so you’re gonna type in 26.35 Times 21.5 now I want u do that on your own once you type in those numbers you’re going to hit the = and it’s that simple and you’ll then get your answer so I hope that helped you to learn how you multiply those the numbers.
Answer:
5/8
Step-by-step explanation:
1/5 x 5
1
1/8 x 5
5/8