Write the missing factor. (x + 1)( ? ) = x2 – 1

(x-1)

Step-by-step explanation:

To solve this problem you must apply the proccedure shown below:

1. You have that the terms x²-1 are perfect squares:

x²-1²

2. Therefore, by definition, you have that the difference of squares formula is:

a²-b²=(a+b)(a-b)

3. Therefore, keeping the information above on mind, you have:

x²-1²=(x+1)(x-1)

Then, the missing factor is (x-1)

a is the correct

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5