Arug has an area of x2+x−20 square feet. which expression represents the dimensions of the rug? a (x+4)(x−5) b (x+2)(x−10) c (x−4)(x+5) d (x−2)(x+10)

the correct option is

C (x−4)(x+5)

Step-by-step explanation:

The area of the rug in square feet is expressed as

x^2+x−20

The given equation is a quadratic equation and the roots of the equation represents the dimensions of the rug. To simplify the equation, we would apply the factorization method.

We will get two numbers such that, their difference will be x and their sum will be -20x^2. The numbers are 5x and 4x. Therefore

x^2+ 5x - 4x −20 = 0

x(x + 5) - 4(x +5)

The roots are (x - 4)(x + 5)

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.