The expression for the length of the pool will be x² - 4x + 3.
What is an expression?
Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication and division.
The width w of a rectangular swimming pool is x+4. the area of the pool is x³-13x+12.
The area is given as:-
A = L x W
x³-13x+12. = L x ( x+4 )
L = ( x³ - 13x + 12 ) / ( x + 4 )
x + 4 ) x³ - 13x + 12 ( x² - 4x + 3.
x³ + 4x²
-------------------
-4x² -13x + 12
-4x² -16x
---------------------
3x + 1 2
3x + 12
-----------------
0
Therefore the expression for the length of the pool will be x² - 4x + 3.
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