Question

Довести тотожність
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Answer 1

7

$3x-(-(12x+18))=3(5x+6)\\3x+12x+18=15x+18\\3x+12x=15x\\15x=15x$

8

$18x*(-1\frac{1}{6} x^{5} y)^{2} \\\\18x*(1\frac{7}{6} x^{5} y)^{2} \\\\18x*\frac{49}{36} x^{10} y^{2} \\\\x*\frac{49}{2} x^{10} y^{2}\\\\\frac{49}{2} x^{10} y^{2}$

$(-\frac{4}{3}abc )^{3} * (-\frac{9}{8}a^{2} b )^{2} \\\\-\frac{64}{27} a^{3} b^{3} c^{3} * \frac{81}{64} a^{4} b^{2} \\\\a^{3} b^{3} c^{3} * 3 a^{4} b^{2}\\\\-3a^{7} b^{5} c^{3}$