Wyłącz wspólny czynnik poza nawias:
(5-x)a+(5-x)b=
(2a+b)y-6(2a+b)=
(a-b)2+5(b-a)=
(5-x)(a+b)
(2a+b)(y-6)
(a-b)(2-5)=-3(a-b)
(5-x)a+(5-x)b=(5-x)(a+b)
(2a+b)y-6(2a+b)=(2a+b)(y-6)
(a-b)2+5(b-a)= (a-b)2-5(a-b)= (a-b)(2-5)= -3(a-b)
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(5-x)(a+b)
(2a+b)(y-6)
(a-b)(2-5)=-3(a-b)
(5-x)a+(5-x)b=(5-x)(a+b)
(2a+b)y-6(2a+b)=(2a+b)(y-6)
(a-b)2+5(b-a)= (a-b)2-5(a-b)= (a-b)(2-5)= -3(a-b)