exam Maths Puzzle Numerical Ability

2x2 = 3y2 + 5 , x - 3 + 5 = 0

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i just need some help working one of these problems. if i am shown how to do it one time, i can get it after that Simplify the following expressions. Write your answers with positive exponents only.

(x^2)^-3(x^-2) / (x^2)^-4