Question

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1.
$x {}^{3} y {}^{2} - x {}^{3} - xy {}^{2} + x$
2.
$1 - x { }^{2} + 4xy - 4y {}^{2}$

Answer 1

1) x³y²-x³-xy²+x = x³(y²-1) -x(y²-1) = x(y-1)(y+1)(x-1)(x+1)
2) 1-x²+4xy-4y² = 1-(x-2y)² = (1+x-2y)(1-x+2y)