1 szkoły ponadpodstawowej

I liceum

a) (2x2+1)(x2+3)= &nbsp; 2x2(x2+3)+1(x2+3)= &nbsp;    =2x4+6x2+x2+3= &nbsp; 2x4+7x2+3 &nbsp;

a) P=a⋅(a+2)=a2+2a &nbsp;

a) &nbsp; Pole na początku wynosi:&nbsp; P1​=21​⋅a⋅(a+1)=21​a2+21​a &nbsp;

a) &nbsp; −5x2+3x(x−1)+(2x−1)(x+3)= &nbsp; −5x2+3x2−3x+2x2+6x−x−3=2x−3 &nbsp; &nbsp;

A:  3y(x+y)−3x(x+y)=3xy+3y2−3x2−3xy= &nbsp; 3y2−3x2 &nbsp; &nbsp; A + III &nbsp; &nbsp;

PA​=21​a⋅(a+1)=21​a2+21​a    III