Question

(2а + b)² — 6а – 3b – 4​

Answer 1

Answer:

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Answer 2

Answer:

(2a+b)² = (2a)²+(b)²+2×2a×b.

[using Identity – (a+b)²= a²+b²+2ab]

4a²+b²+4ab–6a–3b–4

arranging like terms

4a²+4ab–6a–4 +b²–3b

taking 4a comman and b as comman

4a(a +b)+b(b–3) – 2(3a–2)

Step-by-step explanation:

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