Question

$\frac{5 x^{3} - 2 x^{2} + 5/x-1 }{x-1} a)x=3 b)x= \frac{1}{2}$

Answer 1

Olá Lucas

(5x^3 - 2x^2 + 5)/(x - 1)

a) 

x = 3

(5*3^3 - 2*3^2 + 5)/(3 - 1) 

(5*27 - 2*9 + 5)/2 = (135 - 18 + 5)/2 = (140 - 18)/2 =122/2 = 61

b)

x = 1/2

(5*(1/2)^3 - 2*(1/2)^2 + 5)/(1/2 - 1)

(5/8 - 1/2 + 5)/(-1/2) = (5/8 - 4/8 + 40/8)/(-1/2)

(45 - 4)/(8*-1/2) = 41/-4 = -41/4 

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