exam Maths Puzzle Numerical Ability

Solve the equation: (4^2-x)(16^x+1)=64

FYI - The 2-x and x+1 the exponents.

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exam Other Question

I need to know how to find the volume of a cube. The question states. The volume of a cube is given V=s^3. Find the length of a side of a cube if the Volume is 729cm^3. The temperature in degrees Fahrenheit,F, is the sum of 9/5 the temperature in degrees Celsius, C, and the constant 32. Which equation best represents this relationship?
A. F= 9/5C + 32
B. F= 9/5(C+32)
C. F= 9/5 + C + 32
D. F= 9/5(C-32)