Question

Quais as raízes da função Y = x² -7x + 6?

Answer 1

Resposta:

Explicação passo a passo:

Usando Y=0 e utilizando bhaskara:

$X = \dfrac{-b +- \sqrt{b^2 - 4ac} }{2a} \\\\X1= \dfrac{7 + \sqrt{49-6*4} }{2} \\\\X1=\dfrac{7 +\sqrt{25} }{2}\\\\X1=\dfrac{7 + 5 }{2}\\\\X1=\dfrac{12 }{2}\\\\X1=6\\\\X2= \dfrac{7 - \sqrt{49-4*6} }{2} \\\\X2=\dfrac{7 -\sqrt{25} }{2}\\\\X2=\dfrac{7 - 5 }{2}\\\\X2=\dfrac{2}{2}\\\\X2=1$

Espero que tenha entendido!