Question

if the length of a rectangle in terms of x is 5xsqare +3x+6 and its width is 7x+9, what is the perimeter of
this rectangle.​

Answer 1

Answer:

the answer will be =10x²+20x+30

Step-by-step explanation:

formula of perimeter of rectancle=2(l+b)

put values

2(5x²+3x+6+7x+9)

2(5x²+10x+15)

2(5x²)+2(10x)+2(15)

10x²+20x+30

Answer 2

Perimeter of the rectangle = 10x² + 20x + 30

Given :

The length of a rectangle in terms of x is 5x² + 3x + 6 and its width is 7x + 9

To find :

The perimeter of the rectangle

Formula :

The perimeter of a rectangle

= 2 ( Length + Width )

Solution :

Step 1 of 2 :

Write down the length and width

The length of a rectangle in terms of x is 5x² + 3x + 6 and its width is 7x + 9

Step 2 of 2 :

Find the perimeter of the rectangle

The perimeter of the rectangle

= 2 ( Length + Width )

= 2 ( 5x² + 3x + 6 + 7x + 9 )

= 2 ( 5x² + 10x + 15 )

= 10x² + 20x + 30

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