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anonymous
 5 years ago
x^22kx+49 is the square of a binomial. What is the possible value of k?
anonymous
 5 years ago
x^22kx+49 is the square of a binomial. What is the possible value of k?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0how do you solve that? Can you show your work pleazzz???

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0(x+a)^2=x^2+2ax+a^2=x^22kx+49 a^2=49 2ax=2kx a=+/ 7 a=k k=a k=+/ 7

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0perfect square \[(ab)^2=a^22ab+b^2\] here \[a=x\] \[b^2=49\] so \[b=7\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0wait rsvitale, where do you get the a from?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0k could be 7 too, (x+7)^2=x^2+14x+49, which would mean k=7

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0a is just a variable for the second term in the binomial

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0why is it (ab)^2 im confused about the beginning of the problem

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0thats the general form of a square of a binomial

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so we want to see what the general form looks like expanded and find what k can be

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[(a+b)^2=(a+b)(a+b)=a^2+ab+ba+b^2=a^2+2ab+b^2\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok satelite, now explain from there. i get that step now so what do we do next... explain it like you just did.... sorry im not very good at math
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