Confirm answer please!
Working Out: http://i.imgur.com/KZa0CcW.jpg http://i.imgur.com/BU3vSr3.jpg
Roots = -0.7341245814220796, 0.2981456008918486(+-)0.9545204034848249i, -1.3621666203616176
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Maths thread (1 Viewer)
- Thread starter drsabz101
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Working Out: http://i.imgur.com/KZa0CcW.jpg http://i.imgur.com/BU3vSr3.jpg
Roots = -0.7341245814220796, 0.2981456008918486(+-)0.9545204034848249i, -1.3621666203616176
leehuan
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Nah it can still Yr 11 actually. You reject all those complex solutions cause you don't know what the square root of a negative is.
Just stupid for day 2
leehuan
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Use WolframAlpha
KingOfActing
lukewarm mess
Can't be right since the answers should all be surds. Don't ever use decimals unless you absolutely have to. Also in an exam you'd have to prove that solving that resultant cubic with the substitutions you made actually solves the quartic (though, in an exam, you're not gonna get a quartic that needs the resultant cubic method of solving).
Green Yoda
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Actually fitzpatrick
Terry Lee
leehuan
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Cambridge is the norm for maths at the 2U and 3U level.
Fitzpatrick, provided you use the new version, is still a healthy substitute. But it's not as good with it's content.
Terry Lee is for at minimal high band 4 students
Fitzpatrick, provided you use the new version, is still a healthy substitute. But it's not as good with it's content.
Terry Lee is for at minimal high band 4 students
Green Yoda
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will use Cambridge when a harder topic comes up, right now im just using my school textbook (fitzpatrick)
Paradoxica
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Really? Because none of the integration questions impress me.
leehuan
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Was any of the HSC integration questions meant to be impressive in 2/3u?
Paradoxica
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Oh, I thought we were talking about 4U
In the case of 3/2, the answer is even more obvious.