Question

simplify( 2x +7)(3x-2)(5x+4)​

Answer 1

$(2x + 7)(3x - 2)(5x + 4)$

$= {(2x \times 3x) - (2x \times 2) + (7 \times3x) </p><p>- (7 \times 2) }$

$= (6 {x}^{2} - 4x + 21x - 14)(5x + 4)$

$= (6 {x}^{2} + 17x - 14)(5x + 4)$

$= 6 {x}^{2} (5x + 4) </p><p>+ 17x(5x + 4) - 14(5x + 4)$

$= 30 {x}^{3} + 24 {x}^{2} </p><p> + 85 {x}^{2} + 68x - 70x - 56$

$= 30 {x}^{3} + 109 {x}^{2} + 138x - 56$