Question

The sum of two numbers is 5 and their difference is 2. Which of the following could be the difference of their squares

Answer 1

x+y = 5
x-y=2
just multiply them, what u get ?

Answer 2

do you know why we are 'multiplying' here ?

Answer 3

Because of the squares?

Answer 4

difference of squares = \(x^2-y^2=(x+y)(x-y)\)
thats why :)

Answer 5

So multiply 5 and 2?

Answer 6

yup.

Answer 7

don't tell me 10 isn't in choices... :P

Answer 8

No, you're right! :D

Answer 9

your welcome ^_^