Question

Q.3 - Simplify:(a+b) (2a+b)+(a+3b)(a-b)​

Answer 1

Answer:

3a^2 + 5ab -2b^2

Step-by-step explanation:

(a+b) (2a+b)+(a+3b)(a-b)

= a(2a+b) + b(2a+b) + a(a-b) + 3b(a-b)

= 2a^2 + ab + 2ab + b^2 + a^2 - ab + 3ab - 3b^2

= 3a^2 + 5ab -2b^2

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Answer 2

Answer:

3a^2+5ab-2b^2

Step-by-step explanation:

(a+b)(2a+b)+(a+3b)(a-b)

2a^2+ab+2ab+b^2+a^2-ab+3ab-3b^2

3a^2+5ab-2b^2