exam Maths Puzzle Numerical Ability

Please can someone walk me through factoring this polynomial?

Factor completely

64x^3-27

Thank you

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exam Other Question

Angles A and B are complementary.
Measure of angle A equals to 5x+8 and angle B equals to x-11. Find angle A and angle B I can solve the Pyramid puzzel to a point

A = 44 All the answers are right except B + D which needs to = 129

B = 44 A+ B = 88, B + C = 102 , C + D = 119, A + D