Question

× ao quadrado-×-20=0 me ajudem ​

Answer 1

$\large\boxed{\boxed{\boxed{{Ol\'a}}}}}$

$x^2-x-20=0$

coeficientes:

a = 1

b = —1

c = —20

lembrando que:

$\Delta=b^2-4.a.c$

$\Delta=(-1)^2-4.1.(-20)$

$\Delta=1+40$

$\Delta=41$

$x_{1},_{2}=\frac{-b±\sqrt{\Delta}}{2.a}$

$x_{1}=\frac{-b+\sqrt{\Delta}}{2.a}$

$x_{1}=\frac{1+\sqrt{41}}{2}$

$x_{2}=\frac{-b-\sqrt{\Delta}}{2.a}$

$x_{2}=\frac{1-\sqrt{41}}{2}$

:::::::::boa interpretação:::::