Question

anyone know year 11 maths

Answer 1

help please

Answer 2

You haven't posted a problem.

Answer 3

for the equation x^2+kx+14=0. The equation has 2 sollutions when the value of k is ???

Answer 4

2 real solutions or 2 complex solutions?

Answer 5

well it says the answer is k>root 56 and k< - root 56 but i need to know how to get it

Answer 6

discriminant must be greater than 0 so b^2-4ac >0 means k^2-56>0
k^2>56 means k>-sqrt56 or k<-sqrt56

Answer 7

thats because it has two sollutions??

Answer 8

Lets take a simpler example. If x^2 =4, then x=2 or x=-2
If x^2<4, x must be less than two or greater than -2 (pick some numbers and try it.)
If x^2 > 4 then x must be greater than 2 or less than -2. Again pick some numbers and try it.

Answer 9

oh k

Answer 10

So similarly if k^2 >sqrt56, k would have to be bigger than sqrt56 or less than -sqrt56

Answer 11

yes

Answer 12

11 year old math or grade 11 math?

Answer 13

grade

Answer 14

I guess it doesn't matter anyways. I know both.