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Exercise

$\left(2+\sqrt{y}\right)\left(2-\sqrt{y}\right)$

Step-by-step Solution

1

The sum of two terms multiplied by their difference is equal to the square of the first term minus the square of the second term. In other words: $(a+b)(a-b)=a^2-b^2$.

$4-y$

Final answer to the exercise

$4-y$

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Main Topic: Special Products

Special products is the multiplication of algebraic expressions that follow certain rules and patterns, so you can predict the result without necessarily doing the multiplication.

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