exam Maths Puzzle Numerical Ability

How do I make a 15 degree angle from a 90 degree angle only using angle bisectors?

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exam Other Question

Find the quotient and remainder of f(x)= x^3-4x^2+5x+5 divided by p(x) = x-1. My answer is x^2+2x+2; 7 but unsure if it is right. thanks for looking over my answer. Can you help me with this? Thanks!!!....Hint: In exercises 29-42, refer to examples 6 and 7........not sure exactly what to do with this...

5x(x-7) + 3(x-7)