# How do you solve -x^2+2x-1 ?

Jun 11, 2018

$x = 1$ (double answer)

#### Explanation:

a way of solving it it with sum and multiplication. with an equation like this one in the form $a {x}^{2} + b x + c = 0$ the sum of your answers is

-b/a and the multiplication is c/a.
so in this case:

sum: $- \frac{2}{-} 1 = 2$

multiplication: $- \frac{1}{-} 1 = 1$

So what numbers have sum 2 and multiplication 1?

$1 + 1 = 2$

$1 \cdot 1 = 1$

1 and 1! so $x = 1$