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

Answer:

x = 1.074

x = -0.931

Step-by-step 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 $=\frac{+1\pm \sqrt{(-1)^{2}-4(7)(-7)}}{2(7))}$

$=\frac{1\pm \sqrt{1+196}}{14}$

$=\frac{1\pm \sqrt{197}}{14}$

$x=\frac{1\pm 14.035}{14}$

x = 1.074

x = -0.931