Rozłóż wielomian na czynniki.
a). a^2 - ac + ab - bc=
b). 10ab + 5ac + 4bd + 2cd=
c). 21a^2*b^2 - 42cb^2 + 3a^2 -6c=
d). -3x^2y - y + 4z - 2xy + 8xz + 12x^2z=
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a) a(a-c)+b(a-c)=(a-c)(a+b)
b) 5a(2b+c)+2d(2b+c)=(2b+c)(5a+2d)
c) 21b^2(a^2-2c)+3(a^2-2c)=(a^2-2c)(21b^2 +3)
d)-y(3x^2+2x+1)+4z(3x^2+2x+1)=(4z-y)(3x^2+2x+1)