Question

ПОМОГИТЕ РЕШИТЬ! подробно!
(3x-2)^2=
(9x-2y)^2=
(4-5x)^2=

Answer 1

(3х-2)²=(3х-2)(3х-2)=9х²-6х*2-4=9х²-12х+4
(9х-2у)²=(9х-2у)(9х-2у)=81х²-18ху*2+2у²=81х²-36ху+4у²
(4-5х)²=(4-5х)(4-5х)=16-20х*2+25х²=16-40х+25х²