Question

Factorise
1) a⁴+4b⁴
2) x⁴-7x²y²+9y⁴
3) (a+b)⁴ - (a+b)²
4) 9p² - 4q² + 4qr - r²
5) 16(3x+y)² - 9(x+ 2y)²​

Answer 1

Answer:

hi

step by step explanation