factorize x⁴-5x²+4.
Answers
Answered by
30
x⁴+4x²+1x²+4
(x⁴+4x²)(1x²+4)
x²(x²+4)+1(x²+4)
(x²+1)(x²+4)
Answered by
15
Answer: x = 2,1
Step-by-step explanation:
x⁴ - 5x²- 4
= x⁴ (-x² - 4x²) - 4
= x⁴- x²- 4x²- 4
= x²( x²-1)-4(x² -1)
= (x² -4)( x²-1)
so, x²= 4 , x²= 1
x=2,1
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