(х+1)(х-2)⩾ х²+3х-4

Question

(х+1)(х-2)⩾ х²+3х-4

Answer 1

task/29940940  ( x+1)(x-2)⩾ x²+3x-4

"решение"   ( x+1)(x-2)⩾ x²+3x-4  ⇔ x²- x-2 ⩾  x²+3x-4  ⇔ 2 ⩾ 4x ⇔ x ≤ 0,5.

ответ  : x ∈ ( - ∞ ; 0,5] .

Answer 2

!!!!!!!!!!!!!!!!!!!!!!

---