Advertisements
Advertisements
Question
Solve:
x4 – 10x2 + 9 = 0
Sum
Advertisements
Solution
x4 – 10x2 + 9 = 0
`=>` x4 – 9x2 – x2 + 9 = 0
`=>` x2(x2 – 9) – 1(x2 – 9) = 0
`=>` (x2 – 9)(x2 – 1) = 0
If x2 – 9 = 0 or x2 – 1 = 0
`=>` x2 = 9 or x2 = 1
`=>` x = ±3 or x = ±1
shaalaa.com
Is there an error in this question or solution?
