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dlinn [17]
3 years ago
14

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

Mathematics
2 answers:
Schach [20]3 years ago
8 0
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
tiny-mole [99]3 years ago
3 0
He number that must be added is four because (x+2)^2=x^2+4x+4
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