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1,5x-1,5
2
a)
x(x2+2x+1)-9-(-4x3+8x3-6)/2 =0
x³+2x²+x-9+(4x³-8x³+6)/2=0
x³+2x²+x-9+2x³-4x³+3=0
-x³+2x²+x-6=0
2) A: 3x2-xy B: -2y C: 3x
a) (A*B)*C
[(3x²-xy)*(-2y)]*3x=(-6x²y+2xy²)*3x= -18x³y+6x²y²
b) A*(B*C)
(3x²-xy)*(-2y * 3x)= (3x²-xy)*-6xy= -18x³y+6x²y²
c) (A+B)*C
(3x²-xy-2y)*3x=9x³-3x²y-6xy
d) A*C+B*C
(3x²-xy)*3x-2y*3x=9x³-3x²y-6xy