Solve (find x intercepts) using the quadratic formula

f(x)= -5x^+9x-4​ ​

-intercepts at and

Step-by-step explanation:

A quadratic in the form crosses the -axis when .

The first step is replacing with .

So: . With the information above, we can find the intercepts by setting .

Therefore .

Now we can use the quadratic formula because it is in the form .

Note the quadratic formula: .

To find the values of , and we can compare the equation to the general equation.

Therefore: , and .

Now put these values into the quadratic formula:

And simplify:

, .

, therefore

Now we can have two values for . One when we take away the discriminant () and one when we add it.

So

or

Therefore -intercepts at and

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9

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