Ineed to find all roots of x^4 - 64x

Hello from MrBillDoesMath!

   0, 4,  -2 -2 sqrt(3) i,  -2 + 2 sqrt(3) i

Discussion:

Factor the expression:

x^4 - 64x   = x (x^3 -64)   =  x (x-4)* (x^2 +4x + 16)    

The roots  0, 4 are evident from the above factorization. Use the quadratic formula to find the roots of the quadratic. They are

x = -2 -2 sqrt(3) i

x = -2 + 2 sqrt(3) i

Thank you,

MrB

x = 2

step-by-step explanation:

if sr parallel to ba then the sides bc and ac are in proportion, that is

= ← substitute values

= ( cross- multiply )

27x = 6(4x + 1)

27x = 24x + 6 ( subtract 24x from both sides )

3x = 6 ( divide both sides by 3 )

x = 2

=

x=0.8898305 is the answer to that equation