Couchman Book 2 Ex 25.3 Q4 b) i) (1 Viewer)

[Pyrobooby]

From the above equation (y=4x-x^2), show that x may be expressed as x=2+sqrt(4-y) or x=2-sqrt(4-y).

I have no clue how to go about this part.

Thanks in advance.

 

[hscishard]

Complete the square, then square root it and then isolate x

 

[Bored Of Fail]

perfect example of 4unit students not knowing 2unit material :|

 

[Pyrobooby]

Ahh, thank you.