Question

Marque a alternativa correta: * a -4 b -3 c -2 d -1 e 0

Answer 1

$delta=(13)^2 -4(40)\\delta=169 - 160\\delta= 9\\\\x'= \frac{-13-3}{2} \\x'=\frac{-16}{2}\\x'=-8\\\\x''= \frac{-13+3}{2} \\x''= \frac{-10}{2} \\x''= -5$

$-5 -(-8) = -5 + 8 = 3$