Question

3X^2+6X-4=0

Answer 1

3x^2+6x-4=0
3(x+2x+1) = 7
(x+1)^2 = 7/团弊3
x+1 =√者唯21/3 or -√21/3
x=(-3+√21)/3 or (-3-√21)/塌嫌族3

Answer 2

3x&78;+6x-4=0 3（x&78;+2x）-4=0 3[(x+1)&78;-1]-4=0 3(x+1)&78;-3-4=0 3(x+1)&78;=7 (x+1)&78;=7/3 x+1=±√21 /3 x=-1±√碰闷21 /3 配方法，咐耐详细笑简弯步骤六...