Quantitative Aptitude

$a, b, c$ are real numbers. The quadratic equation $a x^2 - b x + c = 0$ has equal roots, which is $\beta$. Then:

Options:

• (A) $\beta = b/a$
• (B) $\beta^2 = ac$
• (C) $\beta^3 = \frac{bc}{2a^2}$
• (D) $b^2 \ne 4ac$