Question

factorise 81x⁴-121x²​

Answer 1

Answer:

(3x)⁴-(11x)²

(9x²)²-(11x)²

${a}^{2} - {b}^{2} = (a + b)(a - b)$

(9x²-11x)(9x²+11x)

Answer 2

Answer:

x² (81x² - 121) is the answer

Step-by-step explanation:

81x⁴-121x²​

x² (81x² - 121)