Question

Dado o polinômio P(x)= 2x³ - 5x² + x - 3. Calcule P(-3/4)

Answer 1

P ( -3/4) = 2 ( -3/4)³ - 5 ( -3/4)² + ( -3/4) - 3
P (-3/4) =  2 ( - 27/64) - 5 ( 9/16) - 3/4 - 3/1
P(-3/4)  = - 54/64- 45/16 - 3/4 - 3/1 
mmc = 64 
( -54 -180 - 48 - 192 )/64 = 474/64 =  -  237/32

Answer 2

P(x) = 2x^3 - 5x^2 + x - 3 P(-3/4) = 2.(-3/4)^3 - 5.(-3/4)^2 + (-3/4) - 3 P(-3/4) = 2.(-27/64) - 5.(+9/16) + (-3/4) - 3 P(-3/4) = -54/64 - 45/16 - 3/4 - 3 P(-3/4) = -54/64 - 180/64 - 48/64 - 192/64 P(-3/4) = -474/64 P(-3/4) = -237/32