Question Video: Finding the Area of a Rectangle by Multiplying an Algebraic Expression by a Monomial | Nagwa Question Video: Finding the Area of a Rectangle by Multiplying an Algebraic Expression by a Monomial | Nagwa

Question Video: Finding the Area of a Rectangle by Multiplying an Algebraic Expression by a Monomial Mathematics • First Year of Preparatory School

Fill in the blank: The area of the rectangle with dimensions 2𝑥 and 𝑥 + 𝑦 is _.

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Video Transcript

Fill in the blank: The area of the rectangle with dimensions two 𝑥 and 𝑥 plus 𝑦 is blank.

If we consider a rectangle, since the dimensions are two 𝑥 and 𝑥 plus 𝑦, we can let one side be equal to two 𝑥 and the other 𝑥 plus 𝑦. Then we need to think about how we find the area of a rectangle. The area of a rectangle is length times width. If we plug in two 𝑥 for the length and 𝑥 plus 𝑦 for the width, to find the area, we’ll need to distribute this two 𝑥 over both the term 𝑥 and 𝑦. Two 𝑥 times 𝑥 equals two 𝑥 squared. And two 𝑥 times 𝑦 equals two 𝑥𝑦, which makes the area of this rectangle two 𝑥 squared plus two 𝑥𝑦.

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