Question

225 ПЛИС помагите плис

Answer 1

6(x+1)²+2(x-1)(x²+x+1)-2(x+1)³=26;
3(x²+2x+1)+(x³-1)-(x³+3x²+3x+1)=13;
3x²+6x+3+x³-1-x³-3x²-3x-1=13;
3x=12;
x=4.

5x(x-3)²-5(x-1)³+15(x+2)(x-2)=5;
x(x-3)²-(x-1)³+3(x-2))x+2)=1;
x(x²-6x+9)-(x³-3x²+3x-1)+3(x²-4)=1;
x³-6x²+9x-x³+3x²-3x+1+3x²-12=1;
6x=12;
x=2.

(x+2)³-x(3x+1)²+(2x+1)(4x²-2x+1)=42;
x³+6x²+12x+8-x(9x²+6x+1)+8x³-4x²+2x+4x²-2x+1=42;
x³+6x²+12x+8-9x³-6x²-x+8x³-4x²+2x+4x²-2x+1=42;
11x=42-9;
11x=33;
x=3.