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OpenStudy (anonymous):
help plz what is the value of c so that y=x^2+15x+c is a perfect square trinomial? A. 30 B. 15/2 C. 15/4 D. 225/4
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OpenStudy (welshfella):
c must be the square of half the coefficient of x ( which is +15)
OpenStudy (welshfella):
OK?
OpenStudy (anonymous):
ok
OpenStudy (welshfella):
c = (15/2) ^2
OpenStudy (anonymous):
so 56 1/4
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OpenStudy (welshfella):
* 15^2 / 2^2
OpenStudy (anonymous):
I'm sorry I'm having a hard time understanding what to do
OpenStudy (welshfella):
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