Expand if necessary combine like terms (7+x)(7-x)=

49 - x^2

Step-by-step explanation:

(7+x)(7-x)

We know this is the difference of squares

(a-b) (a+b) = a^2 - b^2

7^2 - x^2 = 49-x^2

We can also FOIL

first = 7*7 = 49

Outer: = 7x

Inner: = -7x

Last : -x*x = -x^2

Add them together

49 +7x-7x - x^2

Combine like terms

49-x^2

i dont know if you cant find a way its best to actually add all of them start from 105 tho

step-by-step explanation:

the answer is (-4,-4)

hope this ! : d