Question

Factorise: 1. 49a²b-343b²
2. y³-16y​

Answer 1

Answer:

1. 49a²b-343b²

a^2-b^2 = (a+b)(a-b)

(7a√b+7b√7)(7a√b-7b√7)

2. y³-16y​

(y-2√2)(y^2+8+2√2y)