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OpenStudy (anonymous):
Find the product... (2b+4)(2b-4)
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OpenStudy (anonymous):
Use: \[\large \color{green}{(x+y)(x-y) = x^2 - y^2}\] Here x = 2b and y = 4..
OpenStudy (anonymous):
ok substitute 2b for x and 4 for y...So 2b^2 - 16??
OpenStudy (anonymous):
You will also apply square to 2: \[(2b)^2 - (4)^2 \implies 4b^2 - 16\]
OpenStudy (anonymous):
got it...so what is the product? Sorry math and I just do not get along
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