c)(√3x-1)²-3=(√3x-1)²-(√3)²=(√3x-1-√3)(√3x-1+√3)
f)(x+√2y)²-8y²=(x+√2y)²-(2√2y)²=(x+√2y-2√2y)(x+√2y+2√2y)=(x-√2y)(x+3√2y)
i)[tex]( \frac{3x}{5}-y) ^{2} -4y ^{2}=( \frac{3x}{5}-y)^{2}-(2y) ^{2}=( \frac{3x}{5}-y-2y)( \frac{3x}{5}-y+2y)= [/tex]
=[tex]( \frac{3x}{5}-3y)( \frac{3x}{5}+y) [/tex]
