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OpenStudy (anonymous):
[7.07] Choose the correct product of (5x – 3)(5x + 3). A.25x2 + 30x + 9 B.25x2 − 9 C.25x2 + 9 D.25x2 − 30x + 9
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OpenStudy (anonymous):
To solve this, you use the FOIL method. Do you know what that is?
OpenStudy (anonymous):
F = First O = Outside I = Inner L = Last
OpenStudy (anonymous):
So (5x - 3)(5x + 3) is (5x * 5x) + (5x * 3) + (-3 * 5x) + (-3 * 3) Can you solve it from there? Or...?
OpenStudy (anonymous):
Yeah, I think i've got it. Thank you (:
OpenStudy (anonymous):
No problem!
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