Question

Resolva as equação do 2 grau ×2-5×+6=0 (r2,3)

Answer 1

Resposta:

Explicação passo-a-passo:

a=1

b=-5

c=6

$x=\dfrac{-b\pm\sqrt{b^{2}-4.a.c }}{2.a}\\\\\\x=\dfrac{-(-5)\pm\sqrt{(-5)^{2}-4.1.6}}{2.1}\\\\\\x=\dfrac{5\pm\sqrt{25-24}}{2}\\\\\\x=\dfrac{5\pm\sqrt{1}}{2}\\\\\\x=\dfrac{5\pm1}{2}\\\\\\x_1=\dfrac{5+1}{2}=\dfrac{6}{2}=3\\\\\\x_2=\dfrac{5-1}{2}=\dfrac{4}{2}=2$