甲:(2x-a)(3x+b)=6x^2+(2b-3a)x-ab=6x^2+11x-10
乙:(2x+a)(x+b)=2x^2+(2b+a)x+ab=2x^2-9x+10
所以:
2b-3a=11
a+2b=-9
a=-5
b=-2
(2)正确的是:(2x-5)(3x-2)=6x^2-(4+15)x+10=6x^2-19x+10
甲:(2x-a)(3x+b)=6x^2+(2b-3a)x-ab=6x^2+11x-10
乙:(2x+a)(x+b)=2x^2+(2b+a)x+ab=2x^2-9x+10
所以:
2b-3a=11
a+2b=-9
a=-5
b=-2
(2)正确的是:(2x-5)(3x-2)=6x^2-(4+15)x+10=6x^2-19x+10