book Maths Puzzle Numerical Ability

How would you apply a factoring formula to completely factor the expression "x4 - 1"?

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book Other Question

2 rockets are launched. the first one travels 9000mph. 15 minutes later the second is launched at 10000mph. What is the distance at which both rockets are an equal distance from earth.

Please help me set up the equation.

Thank you problem: q divided by 22 = (9+51) over (8-5) I need to find q