(y-1)(y+3)=12(x+1)^2-3x(x+1)^2=0(y+3)^2=4(2y-5)^2上面的不用了这个(3x+2)^2=(4x-3)(x+1)（x-2)^2-10(x-2)+25=0

Question

(y-1)(y+3)=12 (x+1)^2-3x(x+1)^2=0 (y+3)^2=4(2y-5)^2
上面的不用了 这个( 3x+2)^2=(4x-3)(x+1) （x-2)^2-10(x-2)+25=0

Answer 1

1、y^2+2y-15=0
(y+5)(y-3)=0
y=-5或3
2、(x+1)^2(1-3x)=0
x=-1或1/3
3、y^2+6y+9=16y^2-80y+100
15y^2-86y+91=0
△=1936
y=(86±44)/15=26/3或22/15
4、9x^2+12x+4=4x^2+x-3
5x^2+11x+7=0
△=121-140