Răspunsuri

2014-05-15T14:53:49+03:00
4(4x-2x+5)(4x-3x+2)+9= 4(2x+5)(1x+2)+9=4(2x+5)3x+9=4(2x+5)+13x=4(7x)+13x=20x:4=5x asta e raspunsul
2014-05-15T14:56:20+03:00
4(4x-2x+5)(4x-3x+2)+9=
 =4(2x+5)(1x+2)+9=4(2x+5)3x+9=
=4(2x+5)+13x=
=4(7x)+13x=
=20x:4
=5x