the length of a rectangle is (3x+2) units and its B is (3x-2) units. find the area im terms of x. what will be the area if x=20 units.
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Answered by
1
Step-by-step explanation:
area of rectangle l×b
(3x+2)×(3x-2) {identity (a+b) (a-b)}
it will 9x²-4 area
as x = 20 units
3600-4 = 3596
Answered by
2
Answer:
length =3x+2 and breadth =3x-2
area =length*breadth
area = 3x +2 * 3x -2
= 9x^2 -4
= 3600-4
=3596
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