exam Maths Puzzle Numerical Ability

Multiply using vertical method

(m^2-5mn+3n^2)(m^2+4mn-2n^2)

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exam Other Question

A woman invested $33,000 bonus money and received a total of $970 in interest after one year.If part of the money returned 4% and the remainder 2.25% then how much did she invested If the graph of y=x^2 is transformed to y=3(2)^(-1/4x-1)+1, what are the coordinates of the new focal point? I think (-4,4)????