Question

Formula de Bháskara
letra d, me ajudemmm​

Answer 1

Δ= b²- 4.a.c

Δ= (-1)² - 4.5.7

Δ= 1 + 140

Δ= 141

$x=\frac{-b ± \sqrt{Δ} }{2.a}\\x= \frac{-(-1) ± \sqrt{141} }{2.5}\\x= \frac{+1 ± 11,87}{10}$

X₁= $\frac{1 + 11,87}{10} = \frac{12,87}{10} = 1287$

X₂= $\frac{1 - 11,87}{10} = \frac{- 10,87}{10} = - 1087$

Espero ter ajudado!!