Question

factorise it a(a+b)(2a+b)+(3a+ 2b)( a+b)-(a+b)( a+4b).

Answer 1

Question: a(a+b)(2a+b)+(3a+2b)(a+b)(a+4b)
Solution:
$2 {a}^{2} + {a}^{2} + 2 a {b}^{2} + {b}^{2} + 3 {a}^{2} + 12 {a}^{2} b + 3 {a}^{2} b + 12a {b}^{2} + 2 {a}^{2} b + 8a {b}^{2} + 2a {b}^{2} + 8 {b}^{3}$
$2 {a}^{2} + 17 {a}^{2} b + 14ab + 10a {b}^{2} + {b}^{3} + 3 {a}^{2} + 8 {b}^{3}$
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..hope this helpful.