(1) a=1/2,求a²-3a+5+4²+2a-1;(2) x=-1/2 y=-3/2,求(x+y)²+3x+3y

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/24 13:28:55
(1)a=1/2,求a²-3a+5+4²+2a-1;(2)x=-1/2y=-3/2,求(x+y)²+3x+3y(1)a=1/2,求a²-3a+5+4²

(1) a=1/2,求a²-3a+5+4²+2a-1;(2) x=-1/2 y=-3/2,求(x+y)²+3x+3y
(1) a=1/2,求a²-3a+5+4²+2a-1;(2) x=-1/2 y=-3/2,求(x+y)²+3x+3y

(1) a=1/2,求a²-3a+5+4²+2a-1;(2) x=-1/2 y=-3/2,求(x+y)²+3x+3y
(1)原式=(1/4)-(3/2)+5+16+1-1
=(1/4)-(6/4)+21
=21-(5/4)
=79/4
(2)原式=(-2)^2 +(-3/2)+(-9/2)
=4-6
=-2