问题
解答题
化简 (1)
(2)3x2-[7x-(4x-3)-2x2] (3)-5a+(3a-2)-
(4)(5a2+2a-1)-4(3-8a+2a2) |
答案
(1)原式=
a2b-5ac-3a2c+a2b+3ac-4a2c1 2
=
a2b-2ac-7a2c3 2
(2)原式=3x2-[7x-4x+3-2x2]
=3x2-7x+4x-3+2x2]
=5x2-3x-3
(3)原式=-5a+3a-2-a+
,7 3
=-3a+1 3
(4)原式=5a2+2a-1-12+32a-8a2,
=-3a2+34a-13