Q. Assuming x and y are both positive, write the following expression in simplest radical form.7x3y245x5y4Answer:
Identify Parts for Simplification: Identify the parts of the expression that can be simplified.We have the expression 7x3y245x5y4. The square root can be simplified by taking out factors that are perfect squares.
Simplify Square Root: Simplify the square root. 45x5y4 can be broken down into 9×5×x4×x×y4. Since 9, x4, and y4 are perfect squares, we can take the square root of these separately. 9=3, x4=x2, and y4=y2. So, 45x5y4=3x2y25x.
Combine Simplified Terms: Combine the simplified square root with the rest of the expression.Now we have 7x3y2×3x2y25x.Multiplying the coefficients (7 and 3) and the like terms (x3 and x2, y2 and y2) gives us:7×3×x3+2×y2+2×5x=21x5y45x.
Check for Further Simplifications: Check for any further simplifications.The expression 21x5y45x is already in its simplest radical form. There are no further simplifications that can be made since 5x is not a perfect square and cannot be taken out of the square root.
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