Answer:a=11,b=7Step-by-step explanation:To get to the result we firs multiply the figures on the left hand side. multiplication of each term with its similar term is shown:5×-4=-20x⁷ₓx⁴=x¹¹. Here we add the powers because we are multiplying indices to the same base.y²ₓ y⁵= y⁷Thus the correct answer is a=11 and b=7