Question

solve:
(3a - 4b) (3a - 4b)

(Algebraic expression and identities)
(class 8)​

Answer 1

Answer:

$(3a - 4b )(3a - 4b) = (3a - {4b)}^{2} \\ {(3a - 4b)}^{2} = {(3a)}^{2} + {(4b)}^{2} - 2 \times 3a \times 4b \\ 9 {a}^{2} + 16 {b}^{2} - 24ab$

Answer 2

Identity (II)

$9 a^{2} - 24ab \: + 16b^{2}$

$(a - b) ^{2}$

$= a^{2} - 2ab + b ^{2}$

$\huge\fbox\pink{Answer}$

$(3a - 4b) (3a - 4b)$

Using identity (II)

$(3a) ^{2} - 2 \times 3a \times 4b + (4b) ^{2}$

$9a^{2} - 24ab + 16b ^{2}$