Question

5. (X - 7)(x + 7) = 0​

Answer 1

Answer:

so here we have used a^2-b^2 formula

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

=x^2-49=(x-7)(x+7)

x-7=0. x+7=0

x=7. x=-7

thus x=-7,+7

Step-by-step explanation:

hope this helps mark as brainlist

Answer 2

Answer:

answer is 7

( a+b ) (a-b) is equal to (a square minus b square)

so x square minus 7 square is qual to zero

x^2 =49

and unroot x = 7