Question

-x2+5x=0
resposta completa

equação imcompleta​

Answer 1

Equação 2° Grau  incompleta

fórmula de Bhaskara , sendo que

a=-1,b=+5,c=0

$\Delta &= b^2-4\cdot a \cdot c\\\Delta &= 5^2-4\cdot (-1)\cdot 0 \\\Delta &= 25-0 \\\Delta &= 25 \\\\ x &= \dfrac{-b\pm\sqrt{\Delta}}{2\cdot a} \\\\x &= \dfrac{-5\pm\sqrt{25}}{2\cdot -1} \\\\x &= \dfrac{-5\pm 5}{-2} \\\\x_1 &= \dfrac{-5 + 5}{-2} = \dfrac{0}{-2} = 0\\\\x_2 &= \dfrac{-5-5}{-2} = \dfrac{-10}{-2} = 5\\\\\end{align}$

S={(0,5)}.

Answer 2

Oi..

- x² + 5x = 0

x(-x + 5)=0

x' = 0

-x + 5 = 0

- x = - 5 (- 1)

x" = 5

S = {x' = 0 e x" = 5}

Boas Lições.