Question

(5a+3b)^2+2(5a+3b)(4a-3b)+(4a-3b)​

Answer 1

$(5a {}^{} \: + 3b {)}^{2} + 2(5a + 3b)(4a - 3b) + (4a - 3b) { }^{2} \\ 25 {a}^{2} \: + 30ab + 9 {b}^{2} + 10a + 6b \times 4a - 3b + 16a {}^{2} - 24ab + 9b {}^{2} \\ on \: arranging \\ 25 {a}^{2} + 16 {a}^{2} + 30ab - 24ab + 9 {b}^{2} + 9 {b}^{2} + 10a \times 4a + 6b \times 3b \\ 41 {a}^{2} + 6ab + 18b {}^{2} + 40 {a}^{2} - 18b {}^{2} \\ 80 {a}^{2} + 6ab$

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