Question

factorise 7^3+(4x)^3​

Answer 1

Step-by-step explanation:

${7}^{3} + {4x}^{3}$

according to the identities

${x}^{3} + {y}^{3} = (x + y)( {x}^{2} - xy + {y}^{2} )$

$(7 + 4x)( {7}^{2} - 7 \times 4x + {4x}^{2} )$

$( 7+ 4x)(49 - 28x + 16 {x}^{2} )$

Answer 2

Step-by-step explanation:

7³ + (4x)³

= ( 7 + 4x ) ( 7² + 7 × 4x + (4x)²)

= ( 7 + 4x ) ( 49 + 28x + 16x²)