Question

Aduceti la forma cea mai simpla :a)2x(x+3)+(x-1)²-x(x+2)
b)-10x(x²+x-1)+(x-1)(x+2)-(x+3)(x-3)
c)(2x+5)³:(2x+5)²+(3x+1)²-(3x-1)²
d)15x(2x-3)-(5x)²:(-5x)+(x+1)³:(x+1)²

Answer 1

Ti-am atasat poza cu rezolvarea punctului a si b, imediat o sa rezolv si restul 

Answer 2

a)2x(x+3)+(x-1)²-x(x+2)=2x²+6x+x²-2x+1-x²-2x=2x²+2x+1
b)-10x(x²+x-1)+(x-1)(x+2)-(x+3)(x-3)=
-10x³-10x²+10x+x²+2x-x-2-x²+3x-3x+9=-10x³-10x²+11x-7
c)(2x+5)³:(2x+5)²+(3x+1)²-(3x-1)²=
(2x+5)³⁻²+9x²+6x+1-9x²+6x-1=2x+5+12x=14x+5
d)15x(2x-3)-(5x)²:(-5x)+(x+1)³:(x+1)²=
30x²-45x-25x²:(-5x)+(x+1)³⁻²=30x²-45x+5x+x+1=30x²-39x+1