Question

Разложите на множители. a)y^2-y+2y-2 b)x^2-25y^2 v)ab^2-2ab+a

Answer 1

А) у²-у+2у-2=(у²+2у)-(у+2)=у(у+2)-(у+2)=(у+2)(у-1)
б) х²-25у²=х²-(5у)²=(х-5у)(х+5у)
в) ab²-2ab+a=a(b²-2b+1)=a(b-1)²=a(b-1)(b-1)

Answer 2

А) (y^2-y) + (2y-2) = y(y-1) + 2(y-1) = (y-1) (y+2)

b) (x-5y) (x+5y)

v) = (ab-a) ^2.