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OpenStudy (anonymous):
f(x) = x^2 + 2x, find f(a - 3).
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OpenStudy (anonymous):
(a-3)^2+2(a-3) a^2+9+2a-6 a^2+2a+3 Am I right?
OpenStudy (perl):
(a-3)(a-3) + 2(a-3) a^2 - 6a + 9 + 2a -6 a^2 - 4a + 3
OpenStudy (anonymous):
Ah I see my stupid mistake thank you!
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