Year 12s: what will be the first way you research your future options? >>

maths..help

MSB47

how do you find the coordinates of the vertex in the equation x²+10x+19?

Reply 1

Felix Felicis

Original post by MSB47

how do you find the coordinates of the vertex in the equation x²+10x+19?

Either differentiate to find the turning point or complete the square.

Reply 2

placenta medicae talpae

Do you know how to differentiate, or have you not got to calculus yet?
(This might affect your approach to the question.)

Reply 3

MSB47

Original post by placenta medicae talpae

Do you know how to differentiate, or have you not got to calculus yet?
(This might affect your approach to the question.)

i have just started calculus and been introduced to the dy/dx formula

Reply 4

placenta medicae talpae

Original post by MSB47

i have just started calculus and been introduced to the dy/dx formula

Cool: calculus will make this nice and simple for you :smile:

You want to find a point where your function, call it f, has gradient 0.
You can do this by differentiating f(x) and setting the result to equal 0.
This will happen at precisely one x-value (as is the case for any parabola).
So all you need to do is crunch the numbers :smile:

(edited 10 years ago)