Resposta ↓
a) ↓ ↓ b) Δ = 36 c) s = {5,5 | -0,5}
a = 1
b = 4
c = ( - 5 )
Explicação passo-a-passo:
Coeficiente a = número acompanhado do x²
Coeficiente b = número acompanhado do x
Coeficiente c = número sozinho
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
[tex]{\boxed{\boxed{\boxed{\sf x^{2} + 4x - 5 = 0 }}}}}}}}}}}}}}}}[/tex]
Coeficientes :
a = 1
b = 4
c = - 5
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Valor do discriminante ou delta :
[tex]\Delta = b^2 - 4.a.c\\\\\\\Delta = 4^2 - 4.1.(-5)\\\\\\\Delta = 16 + 20\\\\\\\Delta = 36[/tex]
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
[tex]x = \cfrac{-b\pm\sqrt{\Delta} }{2.a}\\\\\\x = \cfrac{-(-5)\pm\sqrt{36} }{2.1} \\\\\\x = \cfrac{5 \pm 6}{2} \\\\\\x' = \cfrac{5 + 6}{2} \\\\\\x' = \cfrac{11}{2} \\\\\\{\boxed{\boxed{\sf x' = 5,5\\\\\\}}[/tex]
[tex]x" = \cfrac{5 - 6}{2} \\\\\\\ \ \ \ \ \ \ \ \ \ \ \ {\boxed{\boxed{\sf x" = \cfrac{-1 }{2} \\\\\\\ \ \ \ \ \ ou \ \ \ \ \ \ \\\\\\x" = (-0,5) }}[/tex]
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
