4а²-4а +1
х²+6ух+ 9у²
(1/25)·х²- (1/5)· ух - (1/5)· ух +у²=0,04 х² - 0,4 ху +у²
1)(2a-1)^2 = 4а^2-4а +1
2)(x+3y)^2 = х^2+6ху+ 9у^2
3)(1/5x-y)(1/5x-y)=(1/5x-y)^2 = 2.25х^2-3xy+y^2
4а²-4а +1
х²+6ух+ 9у²
(1/25)·х²- (1/5)· ух - (1/5)· ух +у²=0,04 х² - 0,4 ху +у²
1)(2a-1)^2 = 4а^2-4а +1
2)(x+3y)^2 = х^2+6ху+ 9у^2
3)(1/5x-y)(1/5x-y)=(1/5x-y)^2 = 2.25х^2-3xy+y^2