# i need to solve a math qustion?

2xsquared - 4x -1=0 by comlpling the square

### 1 Answer

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- 9 years agoFavorite Answer
ax²-bx+c = a(x-h)²+k; where h= -b/(2a), k= c- (b²/(4a))

2x²-4x-1=0

therefore,

2x²-4x-1= 2(x-1)²-3

you can also try using this online calculator which will show you step-by-step how to factor

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