Question

x^4-17x^2+16=0 urgent!

Answer 1

Ecuatie  bipatrata

x²=y
y²-17y+16=0
y²-16y-y+16=0
y(y-16)-(y-16)=0
(y-1)m (y-16)=0
y1=16...x1=4...x2=-4
y2=1....x3=1...x4=-1
s={-4;-1;1;4}
as urgent as that!!!

Answer 2

X^4-17x^2+16=0  
x^2 = y 
y^2 - 17y + 16 = 0 
Δ = 289 - 64 = 225 
y1 = (17 + 15)/ 2 = 32/2 = 16 
y2 = (17 - 15) / 2 = 2/2 = 1 

x 1 = √16 = + -  4 
x2 = √ 1 = + - 1 
S = { -4; -1; 1;  4}