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X + 2X - 5X + 8X
b. X la puterea a 3 a : X la a 2 + 3x
c. ( x + 1) * (x+3)
d. (x+1) * (x la a 2a -2) - 2X la a 2 a (x-1) + x(x+1)
Va rogg ajutati ma


Răspuns :

a) x+2x-5x+8x = 6x
b) x^3 : x^2 + 3x = x + 3x = 4x
c) (x+1) * (x+3) = x^2 + 3x + x + 3 = x^2 + 4x + 3
d) (x+1) * (x^2 - 2) - 2x^2 (x+1) + x (x+1) = (x+1) * (x^2 - 2 - 2x^2 + x) = (x+1) * (-x^2+x-2)
x+2x=3x; 3x-5x+8x=6x