Question

Solve:

x^2(x^4 + 16) = 8x^4

Answer 1

take x^2 =t
u get
t(t^2 + 16) =8t^2

Answer 2

how did you get t?

Answer 3

just take x^2=y now
y(y^2 +16)=8y^2
y{y^2-8y+16}=0
y{(y-4)^2}=0
y=0 or y-4=0 means y=0 or 4 means x^2=0 or 4 means x=0 or +2 or -2

Answer 4

thanks s but i still dont get this problem

Answer 5

wts wrong?

Answer 6

why?

Answer 7

x = 0; x = -2; x = 4

Answer 8

i keep getting that