Объяснение:
2)
(√x+√(xy))²= x+2√x*√(xy)+xy= x+2√(x²y)+xy= x+2x√y+xy
3)
(3√6-2√3)²=9*6-2*3*2√6*√3+4*3=54-12√18+12=54-12√(9*2)+12=
=66-36√2
4)
(4√5-7√5)²=16*5-2*4*7√5*√5+49*5=80-56√25+245=325-56*5= =325-280=45
Объяснение:
2)
(√x+√(xy))²= x+2√x*√(xy)+xy= x+2√(x²y)+xy= x+2x√y+xy
3)
(3√6-2√3)²=9*6-2*3*2√6*√3+4*3=54-12√18+12=54-12√(9*2)+12=
=66-36√2
4)
(4√5-7√5)²=16*5-2*4*7√5*√5+49*5=80-56√25+245=325-56*5= =325-280=45