1 9(2m-2n)²-16(m-2n)²
=[3(2m-2n)+4(m-2n)][3(2m-2n)-4(m-2n)]
=(6m-6n+4m-8n)(6m-6n-4m+8n)
=(10m-14n)(2m+2n)
=4(5m-7n)(m+n)
2 (a-1)²+b²(1-a)
=(a-1)(a-1-b...
1 9(2m-2n)²-16(m-2n)²
=[3(2m-2n)+4(m-2n)][3(2m-2n)-4(m-2n)]
=(6m-6n+4m-8n)(6m-6n-4m+8n)
=(10m-14n)(2m+2n)
=4(5m-7n)(m+n)
2 (a-1)²+b²(1-a)
=(a-1)(a-1-b...