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OpenStudy (anonymous):
The width w of a rectangular swimming pool is 7x^2. The area A of the pool is 7x^3 – 42x^2. What is an expression for the length of the pool?
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OpenStudy (aravindg):
do you know formula for area of rectangle?
OpenStudy (anonymous):
no i don't know anything outside of adding & subtracting
OpenStudy (aravindg):
well area of rectangle=\[l \times w\], where l is the length and w is the width
OpenStudy (aravindg):
substitute the given values in this equation
OpenStudy (anonymous):
ok
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