0.5ab²*(-3a²b)*(-2/3)a⁷b⁵c =0,5*(-3)*(-2/3)a¹⁺²⁺⁷b²⁺¹⁺⁵c=a¹⁰b⁸c
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x⁹(5/7 -3/14 - 1 1/2 )=1
x⁹*((10-3-21)/14) =1
-x⁹=1
x=-1
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-(2/3x²y²)⁴ * (-2 1/4xy³)³ =- 2⁴/3⁴ x⁸y⁸ *(-3⁶/2⁶)x³y⁹ =2⁴⁻⁶*3⁶⁻⁴x⁸⁺¹y⁸⁺⁹=(9/4)*x⁹y¹⁷
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(3xy)³*(1/3xy²)²=27*(1/9)x³⁺²y³⁺⁴ =3x⁵y⁷
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(1,2x²z⁵)²*(2x⁴z)³ 9,6x¹⁶z¹³
----------------------- = --------------- =16 x¹⁵z⁵
0,6xz⁸ 0,6xz⁸