You make commission working at foot locker .on Saturday you sold $1,500 worth of merchandise and made $120 in commission. On Sunday you sold $1,300 worth of merchandise: if you made the same percent commission, how much did you earn on Sunday ?.explain

It's a

Step-by-step explanation:

This is a quadratic expression with the highest power of X being 2.

The coefficient of X² = 1

Note that the general form of a quadratic equation is aX² + bX + C

In this question,

a = 1

b = 7

C = 10

First step is to multiply a and C ( a x C)

= 1 X 10 = 10

Then, find 2 factors of 10 which can both add up to give 7, the coefficient of X given in the question.

The possible factors of 10 are 5 and 2. The sum of 5 and 2 is

5 + 2

Hence, the equation can be written as;

X² + 7X + 10 = X² + 5X + 2X + 10

The next step is to group using a bracket and factorise each bracket individually

(X² + 5X) + (2X + 10) =

X( X + 5) + 2( X + 5) =

(X + 5) (X + 2)

(X + 5) (X + 2) are the factors of the quadratic equation, X² + 7X + 10