exam Maths Puzzle Numerical Ability

Solve, and express your answer in exact form: 2^(4x) + 2^(2x) - 12 = 0

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exam Other Question

I need help with this problem Add, using the vertical method.
5x^2+2x-4,x^2-2x-3 and 2x^2-4x-3 Will someone please help me solve this equation? The problem states to perform the indicated operation and simplify: 3/4x=2/3/5/6x-3/4