2x²+7x-3=02x²+7x=3x²+7x/2=3/2x²+7x/2+49/16=3/2+49/16(x+7/4)²=97/16x=-7/4+√97/4 x=-7/4-√97/4
2x²+7x-3=0x²+7/2x+(7/4)^2=3/2+(7/4)^2=73/16(x+7/4)^2=73/16x+7/4=±√73/4x=-7/4±√73/4
