Mathieu is finding the x-intercepts of the function f(x)=x^2+4x+3. his world is shown below.
(in the photo)

the answer is:

(he set the factored expressions equal to each other)

i learned that the hard way trial and error > ~<

which error did mathieu make?

he factored incorrectly.

he did not use the constant as the x-intercept.

(he set the factored expressions equal to each other.)

he incorrectly solved the equation x + 3 = x + 1.

f(x) = x² + 4x + 3

The function intercepts x when y = 0, so, just make the function equals 0

f(x) = 0 = x² + 4x + 3

So, x² + 4x + 3 = 0 and if we factor, x² + 4x + 3 = (x + 3).(x + 1) = 0

And with factoring we know that x intercepts in -3 and -1

the slope of the line is 60

one point on the line is (40,10)

step-by-step explanation:

in the equation outside the parenthesis the equation always tells you the slope. in this case it is 60.

in the parenthesis is also says 40 which is x because it is near the x and 10 is y because it is near y.

c - they will have the same distribution

step-by-step explanation:

this is the only one that could make sense. : )