Question

Solve using the quadratic formula.

x² - 9x + 20 = 0

Answer 1

In the quadratic formula, we have
\[(-b \pm \sqrt{b^2 - 4ac})/2a\]
and from your equation,
a = 1, b = -9, c = 20. Try to solve it now with these hints.

Answer 2

5,4 ??