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OpenStudy (anonymous):
x+4/x^2-4 - 15/x-2 Subtracting expressions.
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jhonyy9 (jhonyy9):
x^2 -4=(x-2)(x+2)
OpenStudy (anonymous):
how?
jhonyy9 (jhonyy9):
so (x+4-15(x+2))/(x-2)(x+2) =(x+4-15x-30)/(x-2)(x+2) =(-14x-26)/(x-2)(x+2) = =-2(7x+13)/(x-2)(x+2)
jhonyy9 (jhonyy9):
x^2 -4 =(x-2)(x+2) -us formula a^2 -b^2 =(a-b)(a+b)
jhonyy9 (jhonyy9):
ok ?
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OpenStudy (mertsj):
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