Algebra
posted by Robo .
Solve by factoring.
2x^4 + x^2 = 1

Follow these steps:
1.Move all terms to one side of the equation, usually the left, using addition or subtraction.
2.Factor the equation completely.
3.Set each factor equal to zero, and solve.
4.List each solution from Step 3 as a solution to the original equation. 
I understand that. Problem is that I am not getting the same answer as the book.
Sqrt 2/2 and  sqrt 2/2 
x= } 1/ã2

Substitute y=x²
2y²+y1=0
Solve to get
y=1 or y=1/2
if x²=1, x=±i
if x²=1/2, x=±(1/2)=±(√2)/2 
if x²=1/2, x=±√(1/2)=±(√2)/2

Thanks! got it.

You're welcome!
Respond to this Question
Similar Questions

Factoring
x2(squared)4x+4 I would factor this into (X  2)(X  2) If you don't know the rules for factoring, post, and we can show you how to do it. I don't know the factoring rules. My algebra teacher couldn't teach. 
Algebra
Solving quardratic equations using factoring. 2X^2+2X4=0 The book says the answer is 2,1. I got the 2,1 but not in the order of 2,1. I used FOIL to solve. When I use 2,1 I don't can not solve. When I use 1,2. I can solve. I am … 
algebra
solve by factoring 2a^23a=5 
algebra
Solve by factoring: 3x^2 + 2x  1 = 0 
algebra
Solve by factoring: 6x^2 + x = 5 
algebra 2
x^24x32=0 solve by factoring 
Pre algebra
How do I solve Quadratic equations by factoring? 
Algebra
Solve by factoring a^26a+9=0 
Algebra
Solve the equation. Use factoring or the quadratic formula, whichever is appropriate. Try factoring first. If you have any difficulty factoring, then go right to the quadratic formula. (Enter your answers as a commaseparated list.) … 
Algebra II
Need help please. Thank you. 1. Determine whether the function has a maximum or minimum. State that value. f(x)= 2x^24x 2. Determine what c would in order to complete the square. x^25x+c 3. Solve the quadratic by factoring. 3x^216x+5=0 …