exam Maths Puzzle Numerical Ability

given angle 1 and angle 2 are complementary
ray BD bisects angle ABC
Prove: m angle 2 = 45 degrees

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exam Other Question

Problem 1
(-6)2 pie - 4 2 pie

Problem 2
-9 2pie - (-6) 2pie
Can someone help me factor the following equation:
2 3
9a -24ab +16b
The 2 and 3 above the equation are exponents.
Thank