factorising help (1 Viewer)

[kr73114]

ie) 3b^4-13b^2-2=0

 

[addikaye03]

ie) 3b^4-13b^2-2=0

IF you need, make it look nicer

Let u=b^2

3u^2-13u-2=0

It won't fartorise nicely so quadratic formula:

u=[13+- sqrt( 13^2+24)]/ 6

Then Resubstitute for u [b^2]

b=+-sqrt {13+- sqrt( 13^2+24)]/ 6}

 

[adomad]

this type of problem is called equations reducible to a quadratic.

 

[kr73114]

so what would be the solutions for b?

 

[Cazic]

addikaye03 gave them in his last line.