Find the constant term that should be added to make the following expressions a perfect-square trinomial?

x^2-8x

Top 2 Answers

A few days ago

mathvideosonline.com

Favorite Answer

This is a formula that you should apply:

(a-b)^2=a^2 -2ab +b^2

In your problem a=x and b=4

so b^2= 16

Then x^2-8x+16x^2= (x-4)^2

http://www.math-videos-online.com/

A few days ago

scripta_elegans

the last term is +16 giving the perfect square (x-4) squared

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