Mathematics: When you solve x^2 - 8x + 7 = 0 what is the last step of the equation before you simplify to get the two answers? * O x = -4 13 O x = 3 + 4 O x = 4 + 3

When you solve x^2 - 8x + 7 = 0 what is the last step

johnsonkia873

11.05.2021

x = 1 and x = 7

Step-by-step explanation:

The given equation is x^2 - 8x + 7 = 0 .

We need to solve the equation.

It is a quadratic equation whose solution is given by :

$x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}$

Here, a = 1, b = -8 and c = 7

Put values,

$x=\dfrac{-(-8)\pm \sqrt{(-8)^2-4(1)(7)} }{2(1)}\\\\=\dfrac{8\pm \sqrt{64-28}}{2}\\\\=\dfrac{8\pm 6}{2}\\\\=\dfrac{8+6}{2},\dfrac{8-6}{2}\\\\=7,1$

So, the values of x are x = 1 and x = 7.

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grales65

12.11.2021

Its for free

Step-by-step explanation: The store is going out of business because of

Coronavirus LOL

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