Question

Test Practice MULTIPLE CHOICE Which is the f(x)=-x²-2x+3?

Answer 1

x = 1 and x = -3

Explanation:

I started by switching all the signs in the equation to make it

`x^(2)` + 2x - 3

Which is the same as

`Ax^(2) + Bx + C`

Which in this case, the numbers you have for you answer will be able to be added together to be B and multiplied together to make C.

So our B is 2 and C is -3

So we start by writing out all the factors for 3 which are:

1 and 3

3 and 1

And in this case we need it to add up to 2 and multiply to -3 so

(x-1)(x+3)

And (x-1) = 0 and (x+3) = 0 so you must find out what equals x so,

x = 1 and x = -3