Question

Simplify (5x_7)(2x+3)(7x_8)

Answer 1

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${(5x-7)}{(2x+3)}{(7x-8)}$

$[{5}x{(2x+3)} - {7}{(2x+3)}]{(7x-8)}$

$(10{x}^{2}+15x - 14x - 21)(7x - 8)$

$(10{x}^{2}+x - 21) (7x - 8)$

$7x(10{x}^{2}+x - 21) - 8(10{x}^{2}+x - 21)$

$70{x}^{3}+7{x}^{2} - 147x - 80{x}^{2} - 8x + 168$

$70{x}^{3} - 73{x}^{2} + 155x + 168$

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