factoring question 10 points?

Because -5 * 1 = -5, not +5

Yes, the factors you have end up with a -5 at the end, not a +5. Have to use the quadratic formula.

this is how to solve this problem:

a=1

b=-4

c=5

this is the formula for the quadratic formula:

"-b" plus or minus the square root of "b^2 - 4ac".

now u must substitute in the abc's into the formula:

4 plus or minus the square root of 16 - 20.

then u have to solve "16 - 20" which is "-4"

then u will hav to square root the "-4"

but here is the problem: u couldnt square root a negative number.

so that law leaves u with no solution.

so write this next to ur problem: No Solution

hope this helped u out...even though it sounds confusing(srry about that)

if you were to expand (x-5) (x+1), it would be x²-4x-5, because the -5 and +1 multiplied together become a -5

that's why you have to use the quadratic formula

Your factoring produces x^2 - 4x - 5

x^2 -4x +4 =-1

(x-2)^2 = -1

x-2 =i, x-2 = - i

x=2+i, x= 2 -i

because (x-5)(x+1) is x^2 +x -5x -5

which is x^2 -4x -5 not the same problem

No because when you FOIL it (first outside inside last) when you multiply the -5 by the +1, you get -5, not +5.

you just factored it you don't need the quadartic formula

I think you might be missing some information. For example: In the first one should there be a function (addition, multiplication, etc...) between the 2p and the 1, for the second one between the 2xy and the y^2?

yes, it is not factorable over the reals