Question

( 3a - 4 ) ( 3a - 4 )
i want help​

Answer 1

Answer:

( 3a - 4) ( 3a - 4 )                      

⇒ (3a - 4)²                            { We know that (a-b)(a-b) = (a-b)² }

⇒ (3a)² - 2(3a)(4) + (4)²        { Using the identity (a-b)² = a² -2ab +b²}

⇒ 9a² - 24a + 16

Answer 2

Step-by-step explanation:

$= 3a(3a - 4) \: \: \: - 4(3a - 4) \\ = 9 {a}^{2} - 12a \: \: \: \: - 12a \: - 16 \\ = 9 {a}^{2} \: ( - 12a \: - 12a) \: \: - 16 \\ = 9 {a}^{2} \: \: - 16$

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