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OpenStudy (anonymous):
? + 8x +16? replace the question mark to make the trinomial a perfect square
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OpenStudy (anonymous):
x^2?
OpenStudy (anonymous):
how do you know?
OpenStudy (anonymous):
and what about this one? 4x^2 + 4x + ?
OpenStudy (anonymous):
x^2+8x+16 = (x+4)^2
OpenStudy (anonymous):
square root of 16 is 4, proceed from there. you can't factor out the 8, and have something that is squared and give you the value of 2....therefore, must be x^2
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