a(x+b(x+3))=2(x+6)求a,b.
问题描述:
a(x+b(x+3))=2(x+6)求a,b.
答
a(x+bx+3b)=2x+12
ax+abx+3ab=2x+12
(a+ab)x+3ab=2x+12
得①a+ab=2
②3ab=12
由②得ab=4,代入①得a=-2,再代入②得b=-2.