Find the value of x: 2x² − 4. Answers.
A) 0,2  B) -2,2  C) -2,1  D) 0,4  E) -1,4
That quadratic is factored as follows:
2x² − 4 = (2x − 2)(x + 2).
Now, it is easy to see that the second factor will be 0 when x = −2.
As for the value of x that will make
2x − 4	=	0,
we must solve that equation We have:
2x	=	4
x = 2
The solutions are:
x	=	-2 and 2 -2,2
<result>B</result>
Find the value of x: 2x² − 4.