the area of a rectangle is (15x square + 17xy - 18y square)sq.units. find the perimeter of the rectangle.
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area A = l*b = 15x² +17xy - 18y²
= 15x² + 27xy - 10xy - 18y²
= 3x(5x + 9y) - 2y(5x + 9y)
= (5x + 9y)(3x - 2y)
perimeter = 2(l + b)
= 2(5x + 9y + 3x - 2y)
= (16x + 14y) units.
= 15x² + 27xy - 10xy - 18y²
= 3x(5x + 9y) - 2y(5x + 9y)
= (5x + 9y)(3x - 2y)
perimeter = 2(l + b)
= 2(5x + 9y + 3x - 2y)
= (16x + 14y) units.
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