Question

factorise it 81x⁴-1​

Answer 1

Step-by-step explanation:

$\Huge\red{\mathfrak{ Answer }}$

81x^4-1= (9x^2)^2-(1)^2= (9x^2-1)(9x^2+1)

hope it helps ✌

Answer 2

Answer:

81x⁴-1

= (9x²) ² - (1) ²

= (9x² +1) (9x²-1)

= {(3x)² + (1)²} {(3x)²- (1)²}