(4a-5ab+b)-(2a-3ab+3b)的值,其中a-b=5,ab=2
问题描述:
(4a-5ab+b)-(2a-3ab+3b)的值,其中a-b=5,ab=2
答
(4a-5ab+b)-(2a-3ab+3b)
=4a-5ab+b-2a+3ab-3b
=2a-2ab-2b
=2(a-b)-2ab
=2×5-2×2
=6
答
化简代数式得2A-2B-2AB
=2(A-B)-2AB
=2X5-2X2
=6
答
(4a-5ab+b)-(2a-3ab+3b)
=4a-5ab+b-2a+3ab-3b
=2a-2ab-2b
=2(a-b-ab)
=2(5-2)
=2*3
=6
答
(4a-5ab+b)-(2a-3ab+3b)=2a-2ab-2b=2(a-b)-2ab=2*5-2*2=6