(2-3х)(2+3х)=4-9х²
5(х-1)²=5х²-10х+5
х(х+2)(х-2)=х³-4х
(2р-3)(2р+3)-11=4р²-9-11=4р²-20
25-(2а+3)²=(5+2а+3)(5-2а-3)=(2а+8)(2а+2)=4(а+4)(а+1)
(2-х)²-(3х+5)²=(2-х-3х-5)(2-х+3х+5)=(-4х-3)(2х+7)=-(4х+3)(2х+7)
47²-37²=(47-37)(47+37)=10*84=840
3,1²-0,1²=(3,1-0,1)(3,1+0,1)=3*3,2=9,6
36/(13²-11²)=36/(13-11)(13+11)=36/2*24=36/48=3/4
(2-3х)(2+3х)=4-9х²
5(х-1)²=5х²-10х+5
х(х+2)(х-2)=х³-4х
(2р-3)(2р+3)-11=4р²-9-11=4р²-20
25-(2а+3)²=(5+2а+3)(5-2а-3)=(2а+8)(2а+2)=4(а+4)(а+1)
(2-х)²-(3х+5)²=(2-х-3х-5)(2-х+3х+5)=(-4х-3)(2х+7)=-(4х+3)(2х+7)
47²-37²=(47-37)(47+37)=10*84=840
3,1²-0,1²=(3,1-0,1)(3,1+0,1)=3*3,2=9,6
36/(13²-11²)=36/(13-11)(13+11)=36/2*24=36/48=3/4