Homework Help: maths

Posted by unknown on Wednesday, September 14, 2011 at 11:18am.

The length and breadth of a rectangle are (3x - 4y) and (2x - 3y) units resp. Find its area
(i) If the length is increased by 3y units and the breadth is increased by 2y units, what would the area of the new rectangle be?
(ii) Find the difference between the area of the two rectangles

maths - Reiny, Wednesday, September 14, 2011 at 11:27am
old area = (3x-4y)(2x-3y)

new length = 3x-4y + 3
new width = 2x-3y + 3

new area = (3x-4y+3)(2x-3y+3)

for the difference subtract the two.
You would expand each one then collect like terms

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