exam Maths Puzzle Numerical Ability

simplify and reduce to lowest terms or rationalize

1/((sqrt)t-5)+3/((sqrt)t+5)

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exam Other Question

Factor polynomial completely. To begin, state which method should be applied as the first step. Then continue and factor polynomial completely.
m^4 - 9n^4
how do i solve
5x+2y=4
3x+4y+2z=6
7x+3y+4z=29