Which of the following describes all values of x for which 1–x^2 = 0?
Choose one:
A) x >= 1  B) x <= –1  C) x=1; x=–1  D) x =2  E) x=-2
Which of the following describes all values of x for which 1–x^2 = 0?   (A) x &gt;= 1   Plugged in 2. 1–(2)^2 &gt;= 0 -3&gt;=0? NO. Wrong   (B) x &lt;= –1   Plugged in -2. 1–(-2)^2 &gt;= 0 -3&gt;=0? NO. Wrong   (C) x=1; x=–1   Plugged in 1. 1–1^2 = 0. Also -1. 1–(-1)^2 = 0. Since both are correct, answer is c.   (D) x =2   1–(2)^2 = -3. Wrong.   (E) –1 &lt;= x &lt;= 1   1–(-2)^2 = -3. Wrong   Answer is x=1; x=–1.
<result>C</result>
Which of the following describes all values of x for which 1–x^2 = 0?