Question

( x+7) ( x-7) is equal to​

Answer 1

Step-by-step explanation:

There are 2 binomials to be multiplied. This can be done by usual distributive method :

(

x

+

7

)

(

x

−

7

)

=

x

2

−

7

x

+

7

x

−

49

which will now simplify

OR we should be able to instantly recognise that these are the factors which would be obtained by factoring the difference of two squares/ (The brackets are the same except for the signs)

Either method will lead to the result of

x

2

−

49