Question

帮我解下一元二次方程(x-1)^2=4 (2)x^2+2x=0 (3) X^2+3x-4=0 (4)X^2+3=-5x

Answer 1

(1)x1=3,x2=-1

(2)0,-2

(3)-4,1

(4)(-5±√13)/2

(5)(1±√5)/2

(6)1/2,3

(7)(9±√57)/6

(8)△