How much minus one equals minus two

How much minus one equals minus two

-1

One and two-thirds minus x is one and one-sixth
solve equations

Transfer: x = 1 and 2 / 3 minus 1 and 1 / 60
It turns into a false fraction and gets: x = 13 out of 20

How to solve the problem that 2 times the square of x plus x minus 2 equals negative 1

There are two methods
The first one is the first one
2X^2+X-2=-1
2X^2+X=1
X^2+1/2X=1/2
(X+1/4)^ 2-1/16=1/2
(X+1/4)^ 2=9/16
X+1/4=±3/4
X = 1 / 2 or x = - 1
Second:
2x^2+x-2=-1
2x^2+x-1=0
(x+1)(2x-1)=0
X = - 1 or x = 1 / 2