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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 5 - No. 7)

What is the area of a rectangle with width '2x' and length 'x+3'?
2x² + 3
2x² + 6x
x² + 6
2x + 6

解释

Area = length * width. Area = (2x) * (x + 3) = 2x² + 6x

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