Answer:
The answer is 9
Step-by-step explanation:
Since the diagram is rhombus
Then

Then

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Answer:
answer number 2
Step-by-step explanation:
(x-7)(x+7).. this one is super easy, u need 2 numbers that are the same that when multiplied give you -49 but when added and subtracted cancel themselves.. if you multiply -7 times 7 you get -49 and if you add -7+7 they cancel out
Hope this helps