12. The length and breadth of a rectangle are (a² + ab + ab?) units and (a - b) units respectively. Findthe
Perimeter and Area of the rectangle.
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hope it will help u
Step-by-step explanation:
area of rectangle=l×b
=(a²+ab+ab)(a-b)
=a(a²+ab+ab) -b(a²+ab+ab)
=a³+a²b+a²b-a²b-ab²-ab²
=a³-2ab²+a²b sq. units
perimeter=2(l+b)
=2(a²+ab+ab+a-b)
=2(a²+2ab+a-b) units
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