Question

(x+3y)(x-3y)(4x²+y²) use suitable identities to find the following product​

Answer 1

Answer:

$4 {x}^{4} - 35 {x}^{2} {y}^{2} - 9 {y}^{4}$

Step-by-step explanation:

$(x + 3y)(x - 3y)(4 {x}^{2} + {y}^{2} ) \\ \\ (a + b)(a - b) = ( {a}^{2} - {b}^{2} ) \\ \\ ( {x}^{2} - {(3y)}^{2} )(4 {x}^{2} + {y}^{2} ) \\ \\ ( {x}^{2} - 9 {y}^{2} )(4 {x}^{2} + {y}^{2} ) \\ \\ 4 {x}^{4} + {x}^{2} {y}^{2} - 36 {x}^{2} {y}^{2} - 9{y}^{4} \\ \\ 4 {x}^{4} - 35 {x}^{2} {y}^{2} - 9 {y}^{4}$

Answer 2

Answer:

,

Step-by-step explanation:

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