(3x+5)^2=4(x-3)^2
问题描述:
(3x+5)^2=4(x-3)^2
答
9x^2+30x+25=4x^2-24x+36 5x^2+54x-11=0 (x+11)(5x-1)=0 所以x=-11或x=1/5
答
(3x+5)^2-4(x-3)^2=0 (3x+5+2x-6)(3x+5-2x+6)=0 (5x-1)(x+11)=0 x=1/5和-11