Question

Sa se calculeze:
a)(3x-4)(2x+1)-2(x²-4x+2)+3(x-2)
b)x(x-3)-3(x-1)+3x-x²
c)x³-5x²+2x-7-(x³+4x-2)+x²+6x-6
d)4x³-7x²+4x-3+(3x²+6x-5)+x³-4x²-8
e)(72x⁵+48x⁴-36x³+24x²):(12x²)
f)(56x⁷+42x⁶-28x⁴-70x³):(-14x₃)
g)(12x³+14x²-7x):(-7x)+(x+1)(x+2)

Answer 1

a)(3x-4)(2x+1)-2(x²-4x+2)+3(x-2)=6x²+3x-8x-4-2x²+8x-4+3x-6=4x²+6x-14

b)x(x-3)-3(x-1)+3x-x²=x²-3x-3x+3+3x-x²=3-3x=3(1-x)

c)x³-5x²+2x-7-(x³+4x-2)+x²+6x-6=x³-5x²+2x-7-x³-4x+2+x²+6x-6=-4x²+4x-11

d)4x³-7x²+4x-3+(3x²+6x-5)+x³-4x²-8=4x³-7x²+4x-3+3x²-6x+5+x³-4x²-8=3x³-8x²-2x-6

e)(72x⁵+48x⁴-36x³+24x²):(12x²)=12x²(6x³+4x²-3x+2):(-12x²)=-(6x³+4x²-3x+2)=-6x³-4x²+3x-2

f)(56x⁷+42x⁶-28x⁴-70x³):(-14x³)=14x³(4x⁴+3x³-2x-5):(-14x³)=-(4x⁴+3x³-2x-5)=-4x⁴-3x³+2x+5

g)(12x³+14x²-7x):(-7x)+(x+1)(x+2)=x(12x²+14x-7):(-7x)+(x²+2x+x+3)=(12x²+14x-7):(-7)+x²+3x+3=-12/7x²-2x+1+x²+3x+3=-5/7x²+x+4