Question

Using the quadratic formula to solve 2x2 = 4x – 7, what are the values of x?

Answer 1

Answer:

$x = \frac{4 + - i \sqrt{40} }{4}$

Step-by-step explanation:

$2 {x}^{2} - 4x + 7 = 0$

here, a= 2 b=(-4) & c=7

So using the quadratic formula we get;

$x = \frac{ - b + - \sqrt{ {b}^{2} - 4ac } }{2a}$

$x = \frac{ -4 + - \sqrt{16 - 56} }{4} = \frac{ - 4 + - i \sqrt{40} }{4}$

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