Some plusses and/or minuses would have assisted.
(2x - 5)(x + 6) are factors of 2x2 + 7x - 30, giving solutions for x of 2.5 and -6;
(2x + 5)(x - 6) are factors of 2x2 - 7x - 30, giving solutions of -2.5 and 6.
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I assume you mean...,0X2 * 30 * 3= 0=====Only this solution
By using the quadratic equation formula: x = -5 and x = 3
-20
-28
2x2 + 6 = 30 is your statement.2x2 = 24x2 = 12x = ±√12x = ±√(4*3)x = 2√3 or x = -2√3