(1)计算:(a+3)2-a(4+a)(2)计算:(8a3b-5a2b2)÷4a
题型:解答题
问题:
(1)计算:(a+3)2-a(4+a) (2)计算:(8a3b-5a2b2)÷4ab (3)先化简,再求值.[(x+2y)2-(x+y)(3x-y)-5y2]÷2x,其中x=-2,y=
(4)已知a+b=6,ab=2.①求a2+b2的值;②求(a-b)2的值. |
(1)计算:(a+3)2-a(4+a) (2)计算:(8a3b-5a2b2)÷4ab (3)先化简,再求值.[(x+2y)2-(x+y)(3x-y)-5y2]÷2x,其中x=-2,y=
(4)已知a+b=6,ab=2.①求a2+b2的值;②求(a-b)2的值. |