Solution inequality (2x-1) (5x + 2) > 0

Solution inequality (2x-1) (5x + 2) > 0

(2x-1)(5x+2)>0
It can be reduced to the following two inequalities
① {2x-1 ＞ 0 or {2x-1 ＜ 0
5x+2＞0 5x+2＜0
Solution 1 gives x ＞ 1 / 2, and solution 2 gives x ＜ - 2 / 5
That is, X ＞ 1 / 2, or X ＜ - 2 / 5

Solving binary linear equations: 2x + 5x-1 = 0

In the equation: a = 2, B = 5, C = - 1 ∪ Δ = 5 * 5-4 * 2 * - 1 = 33 > 0 ∪ x = - 5 ± radical 33, X1 = - 5 + radical 33, X2 = - 5 - radical 33

Big brother and big sister, help me solve the equation 5x ^ 2-3x-5 = 0, find 5x ^ 2-2x-1 / (5x ^ 2-2x-5) =?

∵ let y = 5x & sup2; - 2x-1 / 5x & sup2; - 2x-5 ∵ be reduced to - 1 / 5 (28 / 5x + 1) where 5x & sup2; - 3x-5 = 0 ∵ X & sup2; - 3 / 5x-1 = 0
(x-3 / 10) & sup2; = 1 + 9 / 100 solution to get x = 3 / 10 ± √ (1 + 9 / 100) Note: √ is the root sign to bring in the answer y = - (67 ± √ 109) / 125!