Q. Assuming x and y are both positive, write the following expression in simplest radical form.74x5y5Answer:
Identify Perfect Square Factors: Identify the perfect square factors within the radical.We have the expression 74x5y5. The number 4 is a perfect square, and we can also pair up the x's and y's into perfect squares. We can write x5 as x4×x and y5 as y4×y.
Simplify Perfect Square Factors: Simplify the perfect square factors.Since 4 is a perfect square, we can take the square root of 4, which is 2. For x4 and y4, since both are perfect squares (x2)2 and (y2)2, we can take the square root of each, which gives us x2 and y2 respectively.
Pull Out Square Roots: Pull out the square roots of the perfect squares from the radical. We can now rewrite the expression as 7×2×x2×y2×x×y, since we have taken the square root of the perfect squares and left the non-perfect squares inside the radical.
Multiply Constants and Variables: Multiply the constants and the variables outside the radical. Multiplying 7 and 2 gives us 14. We also multiply x2 and y2 together. The expression now is 14x2y2xy.
Combine Square Roots: Combine the square roots inside the radical.Since both x and y are under a square root, we can combine them into a single square root. The expression now becomes 14x2y2xy.
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