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(3x-5)²+(x+4)²-(2x-7)²= Urgent va rog :) :* !

Răspuns :

(9x²-2*3x*5 + 5²)+(x²+2*x*4+4²)-(4x²-2*2x*7+7²) = ( 9x²-30x+25)+(x²+8x+16)-(4x²-28x+49)= 9x²-30x+25+x²+8x+16-4x²-28x+49=6x²+10x+95

Sper ca intelegi.

* - inmultire
Vine asa...9xla a 2-25+xla a2+16-4xla a2+49 =6x la a 2+40 Si asa ramane...sper ca te.am ajutat ;)