Question

Select one of the factors of 2x^2 + 16x – 18

x + 9

x + 1

x – 2

x – 8

Answer 1

U know Factor Theorem?

Answer 2

No I don't.

Answer 3

If a polynomial f(x) is divided by (x-a) then (x-a) is a factor of f(x) if f(a)=0

Answer 4

Does it help?

Answer 5

so as per factor therom you get x+1.

Answer 6

right @sauravshakya

Answer 7

Nope... not x+1

Answer 8

It is x+9

Answer 9

I don't see how the factor theorem can help with this question (x^2 + 7x – 44) though?

Answer 10

Did u get for 2x^2 + 16x – 18

Answer 11

I got it but i'm not sure exactly how you worked it out i tried and got stuck

Answer 12

f(x)=2x^2+16x-18
Now, U need to try for every options for which u will get f(a)=0 when it is divided by (x-a)

Answer 13

In this case,
When f(x) is divided by (x+9),
f(-9)=2*(-9)^2+16*(-9)-18=0

Answer 14

So, one of the factor of f(x) is (x+9)

Answer 15

OK that makes sense.

Answer 16

Now, can u do these type of problems?

Answer 17

I think so thank you.

Answer 18

welcome