Question

how to slove 18 b?

Answer 1

slove?

Answer 2

h(x) = x2 – 5x – 11. ??

Answer 3

$$\huge x^2 -5x-11$$

Answer 4

how to solve it if h(x) is 0

Answer 5

put x=0

Answer 6

"if h(x) is 0" means h(x) = 0

"put x = 0" means h(0)

Answer 7

h(x) = x^2 – 5x – 11 = 0

Answer 8

h(0) = 0^2 -5*0 - 11 = -11

Answer 9

one question at a time

Answer 10

h(x)=0 it means that x=0

Answer 11

@HARSH123 how does it mean that?

Answer 12

When you write: "h(x)=0" No value has been given to x, but the whole equation has been set equal to 0, right?

Answer 13

So, h(x)=0 does not mean that x=0.

Answer 14

but the answer is sayin -1.65 or 6.55 o.o how is that possible?

Answer 15

h(0) means x=0

Answer 16

@luzala Do you know the quadratic formula?

Answer 17

then what i the answer can u tell me

Answer 18

\[ax^2+bx+c=0\\\,\\x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]

Answer 19

yeahhh..
@skullpatrol we have to use that?

Answer 20

ohhhh .... got it

Answer 21

OMG thankyou @skullpatrol

Answer 22

Thanks for trying to understand :)

Answer 23

:D

Answer 24

You have to use the quadratic formula because you can't factor $$ x^2 – 5x – 11$$ since 11 is a prime number with factors of 1 and 11 which don't add up to 5, right?

Answer 25

yes... iam trying that out ryt now..

Answer 26

This kind of polynomial is called a "prime polynomial," since it is an irreducible polynomial with integral coefficients whose greatest monomial factor is 1.

Answer 27

ok! but i tried the quardratic formula but the ans is not comin...

Answer 28

a = 1, b = -5, and c = -11