Question

factoriser y² - x² + 2x -1

Answer 1

y2, -x2 , 2x, -1
answer

Answer 2

y²-x²+2x-1

=> y²-(x²-2x+1)

=> y²-[(x)²-2×x×1+(1)²]

=> y²-(x-1)²

$(x - y) {}^{2} = {x}^{2} + y {}^{2} - 2xy$

now , using formula

=> a²-b² = (a+b)(a-b)

we have , => (y+x-1)[y-(x-1)]
=> (y+x-1)(y-x+1)


hope this helps