Question

Factorise this fast!

2a³ + 16b³ – 5a - 10b​

Answer 1

2a3 +16b3–5a–10b

2a3 +16b3–5a–10b= 2(a3+ 8b3)–5(a+2b)

2a3 +16b3–5a–10b= 2(a3+ 8b3)–5(a+2b)=2 (a+2b) (a2+ 4b2–2ab) –5(a+2b)

2a3 +16b3–5a–10b= 2(a3+ 8b3)–5(a+2b)=2 (a+2b) (a2+ 4b2–2ab) –5(a+2b)=(a+2b)(2a2 +8b2–4ab–5)