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 2 years ago
SAT help ? In the equation, K and m are constants . If the equation is true for all values of x, what is the value of m?
 2 years ago
SAT help ? In the equation, K and m are constants . If the equation is true for all values of x, what is the value of m?

This Question is Closed

3psilon
 2 years ago
Best ResponseYou've already chosen the best response.0\[(x8)(xk) = x^{2} 5kx + m\]

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0simplify the left side: x^2  kx  8x + 8k = x^2  (k+8)x + 8k

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0x^2  (k+8)x + 8k = x^2  5kx + m

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0thus you know that k+8 = 5k

robinfr93
 2 years ago
Best ResponseYou've already chosen the best response.0just what bahrom said

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0Now just solve for both.

robinfr93
 2 years ago
Best ResponseYou've already chosen the best response.0bahrom mate can ya help me out with a sum of my own??

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0@robinfr93 let me see the question

3psilon
 2 years ago
Best ResponseYou've already chosen the best response.0@bahrom7893 What does it mean by true for all values of x?

3psilon
 2 years ago
Best ResponseYou've already chosen the best response.0I don't see how you got k+8 = 5k Where did everything else go?

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0it just means equate the two equations.

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0I'm equating the coefficients: x^2  (k+8)x + 8k = x^2  5kx + m

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1347995814720:dw

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1347995848017:dw

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0for those two equations to be equal to each other for all x, k+8 has to equal 5k and 8k must equal m

3psilon
 2 years ago
Best ResponseYou've already chosen the best response.0Could it go the other way around? Like (k+8) = m? @bahrom7893

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0No it couldn't, since x coefficients have to equal to corresponding x coefficients

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.0k+8 is coefficient of x^1, and so is 5k both 8k and m are coefficients of x^0

3psilon
 2 years ago
Best ResponseYou've already chosen the best response.0Ohhhh I see now ok ok thanks
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