naruko-chan_Igualdades+Notables

(3-x)²= 3²-2*3*x+x²=9+6x+x²

(5+x)²=5²+2*5*x+x²=25+10x+x²

(x-3)²= x²-2*x*3+3²= x²-6x+9

(6x+2)²=(6x)²+2*6x*2+2²=36x²+24x+4

(7x-1)²=(7x)²-2*7x*1+1²=49x²-14x+1