Solve the following expression:
x2−1=0 x^2-1=0 x2−1=0
Let's solve the given equation:
x2−1=0 x^2-1=0 x2−1=0 We will do this simply by isolating the unknown on one side and taking the square root of both sides:
x2−1=0x2=1/x=±1 x^2-1=0 \\ x^2=1\hspace{6pt}\text{/}\sqrt{\hspace{4pt}}\\ \boxed{x=\pm1} x2−1=0x2=1/x=±1
Therefore, the correct answer is answer A.
x=±1 x=\pm1 x=±1