Question

expand 2x-5 whole cube​

Answer 1

Answer:

${(2x - 5)}^{3}$

$\large \sf \green {\boxed {We\: know \:that\:-}}$

$\green{ {(a - b)}^{3} = {a}^{3} - {b}^{3} - 3ab(a - b)}$

$8 {x}^{3} - {5}^{3} - 3 \times 2x \times 5(2x - 5)$

$= 8 {x}^{3} - 125 - 30x(2x - 5)$

$= 8 {x}^{3} - 125 - 60{x}^{2} - 150x$

Answer 2

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