naomichristiancn
15.09.2019 •
Mathematics
The length and width of a rectangle is (x-2) and (4-y) respectively. express the area, a, of the rectangle in terms of x and y.
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Ответ:
4x + 2y - xy - 8
Step-by-step explanation:
The area (A) of a rectangle is calculated as
A = length × width , that is
A = (x - 2)(4 - y)
Each of the terms in the second factor is multiplied by each of the terms in the first factor, that is
x(4 - y) - 2(4 - y) ← distribute both parenthesis
= 4x - xy - 8 + 2y, thus
A = 4x + 2y - xy - 8
Ответ:
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