Question

$what \: should \: be \: added \: to4x ^{2} + 3x ^{3} + 11 \: to \: get \: 7x ^{3} + 12 ^{2} + 73$
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Answer 1

Answer -

To get the required number, we need to subtract 4x² + 3x³ + 11 from 7x³ + 12x² + 73.

$7x {}^{3} + 12x {}^{2} + 73 \\ 3x {}^{3} \pm \: 4x {}^{2} \pm\: 11 \\ - - - - - - - - \\ 4x {}^{3} + 8x {}^{2} + 62$

Hence, the answer is 4x³ + 8x² + 62.