AS Level Maths Help!!!!

Hiya,

Could anyone please help me out on how to work out the following question:

a) By completing the sqaure, find in terms of k the roots of the equation
x^ + 2kx - 7 = 0

b) Prove that for all value of k, the root of x^ + 2kx - 7 = 0 are real and different.

c) Given that k = √2 find the exact roots of the equation.

Thanks in advance.

Reply 1

Potassium^2

post some working of where you get stuck.. we're not here to do your homework for you.

Reply 2

sixthformer

Kosovarja94

Hiya,

Could anyone please help me out on how to work out the following question:

a) By completing the sqaure, find in terms of k the roots of the equation
x^ + 2kx - 7 = 0

b) Prove that for all value of k, the root of x^ + 2kx - 7 = 0 are real and different.

c) Given that k = √2 find the exact roots of the equation.

Thanks in advance.

I can help you on msn.
post it, and i'll add. easier on there