1) express kx^2 + 2kx + 2k - 3 in the form k(x+a)^2 + f(k).
hence findthe range of valus of k for which kx^2 + 2kx + 2k - 3 is always positive.
2007-11-09 08:39:47 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
yeh it does n dont giv a stupid anwer like that maths is ace especially becos its the same all over the world
2007-11-09 09:00:27 · update #1
=k(x^2+2x+2) -3
= k(x^2 +2x+1 +1)-3
= k(x+1)^2 +k-3
k>1.5 insures the expression is always positive
2007-11-09 09:03:47 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
Why?
Does it really matter?
In response to your' don't give a stupid answer' answer, i say don't ask a stoopid question. Your question was a no-brainer that any high school dunce could get. Look below even old 'Ironduke' got it right, so it must be easy!.
Try asking something that will test me.....and don't copy it from a junior school text book again puhleeeeeease!
FYI math( no plural dummy) is not the same all over the world, in the Southern Hemisphere its the opposite way round ;)
2007-11-09 16:53:01 · answer #2 · answered by Moscow 5 · 0⤊ 0⤋