Factorise the following: x^2-2x-3

(x-3) (x+1)

Step-by-step explanation:

x^2-2x-3

Factor

What 2 numbers multiply to -3 and add to -2

-3*1 = -3

-3+1 = -2

(x-3) (x+1)

(x+1)(x-3)

Step-by-step explanation:

We must factorize in the form of (x+-?)(x+-?):

x^2-2x-3

(x+1)(x-3)

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.

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72