WAEC - Further Mathematics (2017 - No. 15)
\(\alpha\) and \(\beta\) are the roots of the equation \(2x^{2} - 3x + 4 = 0\). Find \(\alpha + \beta\).
-2
-\(\frac{3}{2}\)
\(\frac{3}{2}\)
2
คำอธิบาย
\(\alpha + \beta = \frac{-b}{a}\)
From the equation, a = 2, b = -3 and c = 4
\(\alpha + \beta = \frac{-(-3)}{2} = \frac{3}{2}\)