1) (a²-1)(a⁴+a²+1)-(a+a³)(a³-a)=(a⁶-1)-(a⁶-a²)=a⁶-1-a⁶+a²=a²-1=(a-1)(a+1)=-0,9775.
2) (x-1)(x+2)-x(x+3)=3x-1;
x²+x-2-x²-3x=3x-1;
5x=-1;
x=-0,2.
х2+2х-х-2-(х2+3х)=3х-1 х2+2х-х-2+х2-3х=зх-1 х2+2х-х-2+х2-3х -зх+1=02х2-8х+1=0
1) (a²-1)(a⁴+a²+1)-(a+a³)(a³-a)=(a⁶-1)-(a⁶-a²)=a⁶-1-a⁶+a²=a²-1=(a-1)(a+1)=-0,9775.
2) (x-1)(x+2)-x(x+3)=3x-1;
x²+x-2-x²-3x=3x-1;
5x=-1;
x=-0,2.
х2+2х-х-2-(х2+3х)=3х-1
х2+2х-х-2+х2-3х=зх-1
х2+2х-х-2+х2-3х -зх+1=0
2х2-8х+1=0