Problems involving quadratic equations | Year 10 Quadratic Equations

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CORRECTION: In Example 3, the quadratic factorises to (h - 5)(h - 17) = 0, hence the solution to the equation is h = 17 and the side lengths are 17 cm, 15 cm and 8 cm. Apologies for any confusion caused.

As my classes move to online learning amid the COVID-19 pandemic, I will be sharing my lessons with you all.

My Year 10 Mathematics class are currently working on a unit on Quadratic Equations. In this video we will look at some examples of worded problems in which quadratic equations can be used to solve the problem.

My class uses the Cambridge Essential Mathematics for the Victorian Curriculum (2nd edition) textbook for Year 10 & 10A. The students also utilise a TI Nspire CAS CX II calculator.
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Thank you so much. You taught so well that i just understood in one go.
thanks

kashifaazam
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Thanks for a great video. Just one question - at 13:15, if the factors of 85 are -5 and -17 then wouldn't the next step be h^2 - 5h-17h +85?

sonalazarus
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For question 3 isn't it (h-5) (h-17)? not (h-22)

tansyofarrell