Odpowiedzi

2010-03-01T15:02:01+01:00
P+(p-r)=p²-pr

(2a+4b-5)×(36-7)=58a+116b-145

(3x-4y-2)(2x+4y)=6x²+4xy-16y²-4x-8y

(2m+5m-1)(3n+6n+6m+2)=(7m-1)*(9n+6m+2)=42m²+63mn-9n-2+8m

Zrobione!
2010-03-01T15:06:53+01:00
P+(p-r)=2p-r

(2a+4b-5)×(36-7)=72a-14a+144b-28b-180+35=58a+136b-145

(3x-4y-2)(2x+4y)=6x² +12xy-8xy -16x²-4x-8y=-10x²+4xy-4x-8y

(2m+5m-1)(3n+6n+6m+2)=(7m -1)(9n +6m+2)= 63mn +42m² +14m -9n-6m-2= 63mn+42m² -9n+8m-2