UPSKILL MATH PLUS

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Answer variants:
m(4m+5n)(2m3n)
1x+1y
(a2+2)(a+1)(a1)
m(4m5n)(2m3n)
(a22)(a+1)(a1)
1x+1y2
Factorise the following by splitting the middle term.
 
S.NoExpressionFactors
(i)\(a^4 - 3a^2 + 2\)
(ii)\(8m^3 - 2m^2n - 15mn^2\)
(iii)\(\frac{1}{x^2} + \frac{1}{y^2} + \frac{2}{xy}\)