Question

Using the quadratic formula to solve 7x2 – x = 7, what are the values of x?

Answer 1

The work is down there... the answer is X= 0.93 0r X=1.07

Answer 2

x = 1.074

x = -0.931

Explanation:

The given expression is 7x² - x = 7

7x² - x - 7 = 0

Now we apply the quadratic formula in the given expression to find the value of x.

Since quadratic formula is

`x=\frac{b\pm \sqrt{b^(2)-4ac}}{2a}`

So we put the value of b = -1, a = 7 and c = -7

x
`=\frac{+1\pm \sqrt{(-1)^(2)-4(7)(-7)}}{2(7))}`

`=(1\pm √(1+196))/(14)`

`=(1\pm √(197))/(14)`

`x=(1\pm 14.035)/(14)`

x = 1.074

x = -0.931