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can someone check this one too??

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Seems good to me!
What do you think you did wrong?
it is correct

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Other answers:

Try and expand (x - 7)(x - 7) and if you get what you started with if you aren't sure.
wait, i want to give you a question. x^2-5x+14=0 find the solution? this will clear your doubts.
yup. thats why i asked you to solve it. you have done these questions where you have two different solutions right?
why cant 2,-7 be an option? or -7,2? how would you decide which one to chose?
ah, they are the same. i meant -2,7. :P
lol. i am sooo sorry. haha. i had to write x^2 -5x-14. :P
yeah. sorry again. :P
yep. :)

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