Question

The formula for finding the roots of quadratic equation is _____.

• A. \(\dfrac{b \pm \sqrt{b^2-4ac}}{2a}\)
• B. \(\dfrac{b-\sqrt{b^2-4ac}}{2a}\)
• C. \(\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\)
• D. \(\dfrac{-b \pm \sqrt{b^2+4ac}}{2a}\)

Hint:

Always remember the quadratic formula in this exact order: \[ \frac{-b \pm \sqrt{b^2-4ac}}{2a} \] Students commonly forget:
• the negative sign before \(b\)
• or write \(b^2+4ac\) instead of \(b^2-4ac\) So be extra careful with signs.

Answer 1

The Correct Option is C