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Ex. 5

Efectuati Va Rog Ex 5 class=

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Slavitescudora
a) (x-9+2x+3)/(x-3)=(3x-6)/(x-3)
b) (9x^3+9x^2-4x-4)/(6x^3-4x^2-6x+4)
EagleEyes
5. a) x-9/x-3 + 2x+3/x-3 = ( x - 9 + 2x - 3 )/x-3 = (3x-6)/(x-3)

b) 9x²-4/x²-1 × x+1/6x-4 = (3x-2)(3x+2)/(x-1)(x+1) × x+1/2(3x-2) =
= 3x+2/x-1 × 1/2 = 3x+2/2(x-1) = (3x+2)/(2x-2)

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