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19. What is the value of c so that x² – 11x + c is a perfectsquare trinomial?
121
–
 one year ago
 one year ago
19. What is the value of c so that x² – 11x + c is a perfectsquare trinomial? 121 –
 one year ago
 one year ago

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specialisttBest ResponseYou've already chosen the best response.0
ignore the 121 lol
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
well, a perfect square is of the form (a+b)^2, which expands out to: a^2+2ab+b^2 lets compare that to what you are given x^2 –11x + c looks like a=x, and 2bx = 11x id say b = 11/2 so c = b^2
 one year ago

specialisttBest ResponseYou've already chosen the best response.0
i have worked it out and i cannot find the right answer.. the choices are, 121 121 over 4 11 over 4 121 over 2
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
.... id say b = 11/2 so c = b^2 what praytell is (11/2)^2 ?
 one year ago

timo86mBest ResponseYou've already chosen the best response.0
is this completing the square?
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
no, 11/4 you got the /4 part right now what is (11)^2 ?
 one year ago

specialisttBest ResponseYou've already chosen the best response.0
121/4.. im pretty sure that it!
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
\[\frac{11}{2}*\frac{11}{2}=\frac{(11)^2}{(2)^2}\]
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
yes, that would be it :)
 one year ago

specialisttBest ResponseYou've already chosen the best response.0
okay thank you soo much! XD
 one year ago
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