exam Maths Puzzle Numerical Ability

Can you help me simplify
(4+8i) * (-9 + i)
Thank you

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exam Other Question

How many ways can a committe of 7 people be selected from a group of 15 people Perform the Indicated Operations Reduce to Lowest Terms

1.)

3 3
__ - ___
2y 2y+4

Simplify each complex fraction. Reduce to lowest terms

2.)

1 + 1
___ ___
3