Question

СРОЧНО ПОМОГИТЕ ХЕЛП
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Answer 1

Ответ:

Х=3

216-8х куб=72х-8х куб

72х=216

х=3

Answer 2

$\displaystyle\bf\\\underbrace{(6-2x)(36+12x+4x^{2}}_{6^{3} -(2x)^{3}} =72x-8x^{3} \\\\\\216-8x^{3}-72x+8x^{3}=0\\\\\\72x=216\\\\\\x=3$