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'Problems on Maximisation and Minimisation' according to my textbook D: it's the cambridge one btw. 298-299

Heeellooo :D So I'm having trouble with a few questions on maximisation and minimisation for school. Keep in mind you can't use calculus to solve these cause we haven't learnt them at school yet. I think you have to get some general equation and find the vertex and hence the max or min D...

Actually; it was what the exercise was called in my textbook ? :D

I'm pretty sure we use a cambridge textbook. Can't remember LOL; it's pretty rainbowy though.

We're not even allowed to do more than 13 units at my school in yr 11. LOL

.... oooohhh. LOL. I get it. Ty. :D

Yeaah; I'm having trouble with this question. sqroot(5+x) + sqroot(x) = 5 Solve for x. Your help will be greattllyy appreciated. :D

Aaskldjaskljdklsj. I just need one more dotpoint to finish off my Metals syllabus dotpoint notes but like, idk what to write etcetc. I've downloaded a few syllabus dotpoints which other people have made and none of them have answers to this one. D: Gather, process, analyse and present...

Ahh tyty :D

Yeaaahh. I did that, it's just I have a feeling that formula's a big part of this D: Cause in the next exercise I think it full asks us to like use it etcetec. Cause yeah I'm ont he first question, and it tells us to use the point gradient formula, but then it asks us to use y = 1/2 (p+q)x - apq. D:

So I was given a formula Parametric Equation of the chord: y = 1/2 (p+q)x - apq I don't really get what to sub in etcetc. D: I'm extremely confused. Can someone explain this to me ? Using uhm the question below as an example. Find the equation of the chord of the parabola joining the points...