Question

Solve x^2-1=0 using quadratic formula

Answer 1

Answer:

1 or -1

Step-by-step explanation:

To start, let's add in the 0x. We get $x^2 + 0x - 1 = 0$. Now, we use the quadratic formula which is $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$, where a, b, and c are the coefficients in a quadratic ax^2 + bx + c, so plugging in the values, we get $\frac{-0\pm\sqrt{0^2-4(1)(-1)}}{2} \implies \frac{0\pm\sqrt{0-(-4)}}{2} \implies \frac{0\pm\sqrt{4}}{2} = \frac{0\pm2}{2} \implies 1 or -1. \blacksquare$

Answer 2

I am thinking that my solution is correct