Question

Using the quadratic formula to solve x2 = 5 – x, what are the values of x?

Answer 1

$\sqrt{b {}^{2} } - 4ac \div 2a$
$- 1{}^{2} - 4(1)( - 5) \div 2(1)$
$1 + 20 \div 2$
$\sqrt{21 \div 2}$