PreCalcPlease check my answer
Please helpI'm stuck really bad
Thank you for any help you can provide
What are the roots of the equation x^2 4x + 3 = 0
x^2  4x = 3
x^2 +2(2)x + 2^2 = 3 = 2^2
x^2 + 4x + 4 = 1
(x + 2)^2 = 1
qrt (x+2)^2 = sqrt 1
x+2 = plus or minus 1
therefore x=1
x=3 roots are 1 and 3

You did this about the most difficult way.
Consider:
x^24x3=0
(x1)(x3)=0
x= 1, or 3posted by bobpursley

x^2 4x + 3 = 0
factor
(x3)(x1) = 0
x = 3 or x = 1
or complete the square as you tried
x^2 4 x = 3 note sign change of 3
x^2  4 x + 4 = 3 +4 = 1
(x2)^2 = 1
x = 2 +/ 1
x = 1 or x = 3posted by Damon

I believe you are trying to factor the polynomial.
so x^2 4x+3
(x1)(x3) =0
x= 1,3posted by ALISON

Alison, I am sure Sheila was trying to do it by completing the square. Note taking half of the coef. of x and squaring it. Factoring is too easy.
posted by Damon

I did do it the long wayyou way is much simpler Thank you all
posted by Sheila
Respond to this Question
Similar Questions

PreCalc/Trig
Please helpI'm stuck really bad What are the roots of the equation x^2  4x + 3 = 0 I think I was suppose to use b^2  4ac so it would be 4  (4)*1*3 = 12 so the roots would be 12 and 12 Thank you for any help you can provide 
PreCalculus/Trig Check please and help
Could someone please check the first one and help me with the second one. I'm stuckThank you 1.What are theroots of the following polynomial equation? (x+2i)(x5)(x2i)(x+8) = 0 I think the roots are 2i,5,2i,8you take out the 
PreCalc/Trig...
Helpp needed, this is sort of confusing me. Describe the nature of the roots for this equation. 2x^2x+1=0 A. Two real, rational roots B. Two real, irrational roots C. One real, double root D. Two complex roots 
PreCalcPlease check
I have three questions: 1. What is the remainder of (x^3 + 2x^2  5x+4) /(x3) I think the answer is 34?? 2. Evaluate (4+5i)(2+2i) =4(2) +4(2i) + 5i(2) + 5i(2i) = 8 + 8i + 10i+10i^2(1) =2 + 18i 3. Using Rational Roots Theorem, 
PreCalcPlease check
Is this correct? Using Rational Roots Theorem, list all possible rational root of f(x) = 2x^3  3x^2 + 5x+6 Possible roots are p/a = +1, +2, +3, +6. +3/2 
PreCalc
Please help me with this problemI'm stuck (x2)/(x+2) = (x+10)/x I'm not even sure where to startThanks for any help you can provide 
PreCalcPlease check my answerI think I have it
Could someone please check theseI had tried one last night but it was really wrong so I'm been workinghopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x10 =0 2x^2 + 
PreCalcPlease check my answerI think I have it
Could someone please check theseI had tried one last night but it was really wrong so I'm been workinghopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x10 =0 2x^2 + 
PreCalcPlease check my answerI think its correc
Could someone please check theseI had tried one last night but it was really wrong so I'm been workinghopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x10 =0 2x^2 + 
Calculus
relative extrema x^42x^2+5 so far I know how to find the derivative which is 4x^32x now I am stuck... Please help Huh? 4x^32x=0 2x(2x^21)=0 and what are the roots? I will give you a hint: one is x=0 The other two are in the