(1) 14-4X^2 ≥X

问题描述:

(1) 14-4X^2 ≥X
(2) X(X+2)

(1) 14-4X^2 ≥X
4x^2+x-14≤0
(x+2)(4x-7)≤0
-2≤x≤7/4
(2) X(X+2)x^2+2x-3x+x^2-xx>1
(3) (5-X)(X+4)-4(4) (3X+2)(2X-1)-2/3