SOLUTION: The length of a rectangle is 3 times the width. When the length is decreased by 2 and
the width is increased by 3. The area of this new rectangle is 42. Find the dimensions of
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Question 1053332: The length of a rectangle is 3 times the width. When the length is decreased by 2 and
the width is increased by 3. The area of this new rectangle is 42. Find the dimensions of
each rectangle.
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
w and L
L=3w
Original area is wL.
Dimensions changes this way:
L-2 and w+3.
New area is (w+3)(L-2).
New area rectangle is 42.
-
Use algebraic or arithmetic steps to solve from that.
STEPS TO BEGIN:
Look for a factorization, but immediately using formula for general solution of quadratic equation,
, and need the PLUS form;
You can finish the work to finally answer the question.
--
discriminant,
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