bpt a / x ^ 2 + x - 12

Question

bpt a / x ^ 2 + x - 12 <= 0 b 13x ^ 2 + c - 6 = sqrt(4x ^ 2 - 2x + 9); = sqrt 13x-x^ 2 -1; 1x ^ 2 + 2x - 5 = n - 2

Answer

a)  . [ x^2 + x - 12 ≤ 0  ] , [ ( x - 3  ) ( x + 4  ) ≤ 0  ] , [    {[ x - 3 ≥ 0  ] , [ x + 4 ≤ 0  ] , [ {[ x - 3 ≤ 0  ] , [ x + 4 ≥ 0  ] ⇔ [  x > 3   x ≤ - 4   x ≤ 3   x ≥ - 4  .

ai giúp tui lm câu a vs d đi ạa