数学计算题,用因式分解法

1.6x^2+3x=4x+2 6x^2-x-2=0 (2x+1)(3x-2)=0 解得x=-1/2或者x=2/3 2.x^2-8x+16=4x^2-20x+25 3x^2-12x+9=0即 x^2-4x+3=0 (x-1)(x-3)=0 解得x=1或者x=3