Factories:
2a + 6b – 3(a + 3b)2
= 2(a + 3b){-3(a + 3b)2}
= (a + 3b){2(-3a – 9b)}
= (a + 3b)(2 – 3a – 9b)
So,
We get,
2a + 6b – 3(a + 3b)2 = (a + 3b)(2 – 3a – 9b)