Question

factorize x⁴-5x²+4. ​

Answer 1

x⁴+4x²+1x²+4

(x⁴+4x²)(1x²+4)

x²(x²+4)+1(x²+4)

(x²+1)(x²+4)

Answer 2

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