Răspunsuri

2014-11-17T16:34:02+02:00
A).(3x+2y)(4x+5y)=12xpatrat+15xy+8xy+10ypatrat= 12x(la2)+23xy+10y(la2) b.(6x+4y)(3x-y)=18x(la a 2)-6xy+12xy-4y(la2)
c).(7x-3) la a doua=49x^2-56x16 d).(4x+3)^2=16x^2+24x+9 e).(3-2x)(5-x)=15-3x-10x-2x^2=15-13x-2x^2 f).(6x-8)(1-x)=6x-6x^2-8+8=6x-6x^2
g).(2-x)(2+x)=4+2x-2x-x^2=4-x^2 h).(32y)(3-2y)=9-6y+6y-4y^2