exam Maths Puzzle Numerical Ability

Simplify each complex fraction:

A: [1+(3/4)]/[2-(1/8)]

B: [2+(x/y)]/(4/y)

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exam Other Question

What is the result of (5^x)^y multiplied by [5^(3y)]^z? 2x^2+6x+9=0 (finding the value of the discriminant) How many real solutions are there of this equation? I have no idea how to do this question. Please help me