Question

Resolve into factors
x⁴ - 5x² + 4 ​

Answer 1

Answer:

(x +2)(x -2)(x - 1)(x +1)

Step-by-step explanation:

x⁴ - 5x² + 4 ​

Split the middle term:

x⁴ - x² - 4x² + 4

x²(x² - 1) -4(x² - 1)

(x² - 4)(x² - 1)

use identity  a² - b² = (a +)(a - b)

(x +2)(x -2)(x - 1)(x +1)

Answer 2

Answer:

X4-4x2-x2+4

x4-x2-4x2+4

x2(x2-1)-4(x2-1)

(x2-1)(x2-4)

Step-by-step explanation:

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