The length of a rectangle is (3x+2)
units and it’s breadth is (3x-2) units.
Find its area in terms of x. What will
be the area if x = 20 units.
Answers
(3x+2)(3x-2)=20
9x²-6+6x-4=20
9x²-10+6x=20
9x²+6x=20+10
9x²+6x=20+10
9x²+6x=20+10
10x²=30/6
x²=5/10
ans=1/2
this is the explanation of the ans.
hope you understand.
Answer:
Area of rectangle in terms of x is 9x²- 4 square units
Area of rectangle if x = 20 units is 3596 square units.
Step-by-step explanation:
Given,
Length of the rectangle = (3x+2)
Breadth of the rectangle = (3x-2)
Area of rectangle = length × Breadth
= (3x+2)×(3x-2)
= 9x²-6x+6x-4
= 9x²- 4
Area of rectangle in terms of x is 9x²- 4.
Now, Area of rectangle if x = 20 units
9x²- 4 = 9(20)²-4
= 9(400)-4
= 3600-4
= 3596
Area of rectangle if x = 20 units is 3596 square units.
Hence,
Area of rectangle in terms of x is 9x²- 4 square units
Area of rectangle if x = 20 units is 3596 square units.
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