exam Maths Puzzle Numerical Ability

(X^2 + 2xy +Y^2)-49

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exam Other Question

Jennifer is 6 years older than Sue. In 4 years, she will be twice as old as Sue was 5 years ago. Find their ages now. Simplify the expression. Write the reslut using positive exponents only.

5^-7x^-3y^2
____________
5^-4x^-6y^4