book Maths Puzzle Numerical Ability

2 8 -6
4 5 2
-3 -6 -1 evalcuate each determinant by usung diagonals or expansion by minors

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book Other Question

write the equation of the given conics in standard form via completion of the square:
1) Y^2-12X-8X+20=0
2) 16X^2-16Y^2-4X-28Y+66=0

THANK YOU find logcos(pi/5)

thanks so much if you can help me