book Maths Puzzle Numerical Ability

Please help me solve: z^4 + 16
___________
z + 2

Thank You!!!

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book Other Question

A vinding machine has $41.25 in it. there are 255 coins total and the machine only accepts nickels, dimes and quarters. There are twice as many dimes as nickels. How many of each coin are in the machine? fing the roots of the equestion:x^2+4x+8?
1.fing the roots by using compliting the squar method?
2.fing the roots by using factorisation method?
3.fing the roots by usin graphic