\(7x^{2} - 4x - 5 = 0\)
\(7x^{2} - 4x + 5 = 0\)
\(7x^{2} + 4x - 5 = 0\)
\(7x^{2} + 4x + 5 = 0\)
Correct answer is B
Let the roots of the equation be \(\alpha\) and \(\beta\).
\(\alpha + \beta = \frac{-b}{a} = \frac{4}{7}\)
\(\alpha \beta = \frac{c}{a} = \frac{5}{7}\)
\(\implies a = 7, b = -4, c = 5\)
Equation: \(ax^{2} + bx + c = 0 \)
= \(7x^{2} - 4x + 5 = 0\)
In the diagram, a ladder PS leaning against a vertical wall PR makes angle x° with the horizonta...
Factorize completely: \(x^{2} + x^{2}y + 3x - 10y + 3xy - 10\)....
Given that \(\log_{2} y^{\frac{1}{2}} = \log_{5} 125\), find the value of y...
If \(\sin x = -\sin 70°, 0° < x < 360°\), determine the two possible values of x....
If \(\frac{^{n}C_{3}}{^{n}P_{2}} = 1\), find the value of n....
Differentiate \(\frac{x}{x + 1}\) with respect to x...
A car is moving at 120\(kmh^{-1}\). Find its speed in \(ms^{-1}\)....