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OpenStudy (anonymous):
Why is it when I factor x^2+9, that it becomes (x+3i)(x-3i), why not (x+3)(x-3)
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OpenStudy (anonymous):
Kat!
OpenStudy (katrinakaif):
Bonez! If you mulitply it out, (x+3)(x-3) will give you x^2 -9 and not +9 :P
OpenStudy (katrinakaif):
Lets try multiplying with imaginary numbers. Remeber i^2 = -1 |dw:1337839561905:dw|
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