(1).x^2-2x-3=(x-_____)^2+_____; (2).x^2+3x+2=(x+____)^2+____; (3).2x^2+5x+4=2(x+____)+_____.

2024-12-13 03:48:03
推荐回答(4个)
回答1:

(1).x²-2x-3=(x- 1 )²+ ( -4 )

(2).x²+3x+2=(x+ 3/2 )²+ (-1/4)

(3).2x²+5x+4=2(x+ 5/4 )+ 7/8

回答2:

x^2-2x-3=(x-1)^2-4; (2).x^2+3x+2=(x+3/2)^2-1/4; (3).2x^2+5x+4=2(x+5/4)+7/8.

回答3:

(X+1)^2+(-4).。。。(x+3/2)^2+(-1/4)....2(x+5/4)^2+7/8

回答4:

1,4,2,2,2,2x