Nathaniel is using the quadratic formula to solve 0 = x2 + 5x - 6. His steps are shown below.



What are the solutions to the equation?

x = –1, 6
x = –6, 1
x = –22, 27
x = –27, 22

Respuesta :

the answer is x=-6,1

For this case we have the following polynomial:

[tex] x^2 + 5x - 6 = 0 [/tex]

The quadratic formula is given by:

[tex] x = \frac{-b +/- \sqrt{b^2 - 4ac}}{2a} [/tex]

Substituting values in the given equation we have:

[tex] x = \frac{-5 +/- \sqrt{5^2 - 4(1)(-6)}}{2(1)} [/tex]

Rewriting we have:

[tex] x = \frac{-5 +/- \sqrt{25 + 24}}{2} [/tex]

[tex] x = \frac{-5 +/- \sqrt{49}}{2} [/tex]

[tex] x = \frac{-5 +/- 7}{2} [/tex]

Therefore, the solutions are given by:

Solution 1:

[tex]x=\frac{-5+7}{2}=\frac{2}{2}=1[/tex]

Solution 2:

[tex]x=\frac{-5-7}{2} =-\frac{12}{2}=-6[/tex]

Answer:

the solutions to the equation are:

x = –6, 1