Book Maths Puzzle Quadratic Equations

Hi I'm an older student and I have a problem I don't understand. How would you solve polynomials by factoring? This is the problem: 2x^4=16x^2. Thank You

Read Solution (Total 2)

0,-2 root 2,+2 root 2
2x^4=16x^2
2x^4-16x^2=0
2x^2(x^2-8)=0
x= 0,-2 root 2, 2 root 2
10 years agoHelpfull: Yes(1) No(0)

2x^2(x^2-8)=0
=>x^2=0 & x^2=8
=> x=0,0 & x= 2*sqrt2, x= -2*sqrt2
10 years agoHelpfull: Yes(0) No(0)

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