book Maths Puzzle Numerical Ability

equations in standard form

1.x^2-5x-14=0 2.x^2+x-2=0 3.x^2x-4=0

equations not in standard form

1.x^2+4x=-20 2.x^2-2x=99 3.x^2=14=10x

using the dicriminant
1.x^2-4x+10=

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book Other Question

What is the length of Arc XY if Q is the center and angle XQY is 60 degrees. The diameter is 8 degrees. You dont have to give me the answer but if you could explain how to figure out these types of problems it would help alot. Thank-you. (fg)inverse(x)