Project152 Phase 3 Solutions

To prepare for the Specialist External exam, each week Project152 will be presenting 5 new past questions for you to try.
If you stick with us and tune in every week, by the time the externals have rolled around, you will have attempted all 152 of the past questions from the QCAAs external exams.
Link to the week 4 questions (and all previous questions and solutions) can be found here: mathsvideosaus...
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[@brendanconway9849]

Could you please explain or link to a video explaining why lambda wasn't negative in the fifth question? I see you made the same mistake haha!

[@JoelSperanzaMath]

It's just a bit of laziness when rearranging. When you rearrange the equation so that lambda is on the right hand side, it becomes positive.