book Maths Puzzle Numerical Ability

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�</font>x� + 5 - x - 2 = 0
_
x = 1 + 6�</font>x - 9</PRE>

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book Other Question

using -1 as a factor (divide)

8y+5
_______ =
10-16y

thanx How do i solve 3 to the 100th power using a TI-30xa caculator.