Question

$y = x {}^{2} - 4$

Answer 1

y = x² - 4

Δ= 0² - 4 . 1 . -4

Δ= 4

x' $\frac{0+2}{2.1} = \frac{2}{2} = 1$

x'' $\frac{0-2}{2.1} = \frac{-2}{2} = -1$