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OpenStudy (anonymous):
need help :( Use the associative law for addition and the distributive law to show that \(z(z_1 + z_2 + z_3) = zz_1 + zz_2 + zz_3\)
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OpenStudy (helder_edwin):
the \(z\)'s are complex numbers?
OpenStudy (anonymous):
yes
OpenStudy (helder_edwin):
\[\large z(z_1+z_2+z_3)=z[z_1+(z_2+z_3)]=zz_1+z(z_2+z_3) \] \[\large =zz_1+(zz_2+zz_3)=zz_1+zz_2+zz_3 \]
OpenStudy (anonymous):
thanks !
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