Question

construct a word problem on quadratic equation such that one of its answer is 20 (cm, rs., etc)
also solve it ​

Answer 1

20 miter is the original length.

Step-by-step explanation:

QUE: A square shape fabrics is cut in such a way that its parallel sides is decreased by 5 cm and 2 cm respectively. Now, its area is 270 sq cm. What was its original side length?

Sol: let's assume the side length of square was x miter.

Now, its side lengths are (x-5) and (x-2).

It means that it has converted to the rectangle.

• Area = $(x-5) \times (x-2)$

   $270 = x^2 -7x + 10$

   $x^2 -7x - 260 = 0$

   $x^2 -20x + 13x - 260 = 0$

          (x -20) (x + 13) = 0

             x = 20, -13

Since, length can't be negative. So, 20 cm is the original length.

Answer 2

Step-by-step explanation:

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