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OpenStudy (anonymous):
Help Medal and Fan If (9x − 4)(9x + 4) = ax2 − b, what is the value of a? The value of a is _____________.
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OpenStudy (anonymous):
@DanJS
OpenStudy (anonymous):
81x^2 + 36x-36x-16
OpenStudy (anonymous):
81x^2-16
OpenStudy (anonymous):
so it cancels out
OpenStudy (anonymous):
wouldnt it be 81? since 81 is the term for a
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OpenStudy (anonymous):
i mean 81
OpenStudy (anonymous):
lol thanks again
OpenStudy (anonymous):
lol thanks again
OpenStudy (triciaal):
already done difference of 2 squares yes a = 81
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