Question

Solve for x. 2x2+4x−1=0 Enter your answers in the boxes.

Answer 1

$2 \times 2 + 4x - 1 = 0 \\ 4 + 4x - 1 = 0 \\ 4x - 1 = - 4 \\ 4x = - 3 \\ x = - \frac{3}{4}$

Answer 2

Answer:

0.2247,-2.2247

Step-by-step explanation:

Equation : $2x^2+4x-1 =0$

We are supposed to find the values of x .

General form of equation : $ax^2+bx+c=0$

Formula : $x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

a = 2

b = 4

c = -1

So, $x=\frac{-4 \pm \sqrt{4^2-4(2)(-1)}}{2(2)}$

$x=0.2247,-2.2247$

Hence the values of x are 0.2247,-2.2247