BlueBerryPie BlueBerryPie

14-05-2014
Mathematics

Answered

What number should be added to the expression x^2 + 4x to change it into a perfect square trinomial?

Verified Answer :

HunterX HunterX

14-05-2014

he number that must be added is four because (x+2)^2=x^2+4x+4

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14-05-2014

x^2 + 4x
the number to be added is found by dividing the constant of x by 2
and squared the number
so # to be added = ( 4/2)² = 4
the perfect square trinomial is
x² + 4x + 4 = (x + 2 )² which is a perfect square trinomial
I hope this help you

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