SOLUTION: I am taking college Algebra for the first time and since math has always been my worst subject I need all the help I can get. I thank you in advance for all your help. Using the

Question 24374: I am taking college Algebra for the first time and since math has always been my worst subject I need all the help I can get. I thank you in advance for all your help.
Using the quadratic equation x squared -4x-5=0, perform the following tasks:
Solve by factoring: (I got x=5 or x=1)
Solve by completing the square:
Solve by using the quadratic formula:
I submitted this before but never recieved an answer back. I think I may have submitted it wrong. Again thank you for your help. BTW this is all part of the first question.
Answer by yhtong(11) (Show Source): You can put this solution on YOUR website!
Ok, heres what you do. Your questions is x�-4x-5=0
By factorizing
x�-4x-5=0
(x-5)(x+1)=0
and there would be two answers
1) x-5=0
x=5
2) x+3=0
x=-1
By completing of square
x�-4x-5=0
x�-4x =+5
x�-4x+(4/2)�=5+(4/2)�
x�-4x+(2)� =5+(2)�
(x-2)(x-2) =5+4
(x-2)� =9
x-2 = +or- (square root of 9)
x-2 =+or-(3)
and there will be 2 answers as well
1)x=3+2
x=5
2)x=-3+2
x=-1
By formula.
Formula of to solve the above equation is

=
=
=(4+or-6)/2
this also got 2 answers as well
1)x=(4+6)/2
x=10/2
x=5
2)x=(4-6)/2
x=-2/2
x=-1
therefore your answers are 5 or -1
(dont be surprised that i am a secondary pure science stream student)
yh_tong
RELATED QUESTIONS
I have an algebra problem that I am having a hard time solving. It's been 30 years since (answered by solver91311)

I am preparing for my first college algebra exam and math has always been my weakest... (answered by rapaljer)

Hi, I'm taking an online college algebra class but can't quite recall all the review... (answered by stanbon)

I've never been good at math at all. I am in a college algebra class and need help doing... (answered by checkley77)

I've never been good at math at all. I am in a college algebra class and need help doing... (answered by ankor@dixie-net.com)

I am taking Applied Calculus - for the Managerial, Life and Social Sciences. It has been (answered by jim_thompson5910)

Okay this is Very confusing to me since I just opened my Algebra book for my online class (answered by richard1234)

When rewriting an exponential expression with a negative exponent and a positive base to... (answered by rfer)

No real question, just a comment: I need to complete college algebra to get my B.A.... (answered by fractalier)