radicals need help

[zelda1850]

can someone check if this is correct

1) does \(\displaystyle -4\sqrt{6}\) - \(\displaystyle \sqrt{6}\) = -\(\displaystyle 4\sqrt{6}\)?

2) \(\displaystyle -9\sqrt{27}\) = \(\displaystyle 27\sqrt{3}\)

3) \(\displaystyle \sqrt[3]{3}\) * \(\displaystyle \sqrt[3]{-20}\) = \(\displaystyle \sqrt[3]{3}\) * \(\displaystyle -2\sqrt[3]{5}\) = \(\displaystyle 2\sqrt[3]{15}\)

 

[Deleted member 4993]

can someone check if this is correct

1) does \(\displaystyle -4\sqrt{6}\) - \(\displaystyle \sqrt{6}\) = -\(\displaystyle 4\sqrt{6}\)? .....Incorrect

\(\displaystyle -4\sqrt{6}\) - \(\displaystyle \sqrt{6}\) = \(\displaystyle (-4-1)\sqrt{6}\) = \(\displaystyle (-5)\sqrt{6}\)

2) \(\displaystyle -9\sqrt{27}\) = \(\displaystyle 27\sqrt{3}\) .....Incorrect

\(\displaystyle -9\sqrt{27}\) = \(\displaystyle -27\sqrt{3}\)

3) \(\displaystyle \sqrt[3]{3}\) * \(\displaystyle \sqrt[3]{-20}\) = \(\displaystyle \sqrt[3]{3}\) * \(\displaystyle -2\sqrt[3]{5}\) = \(\displaystyle 2\sqrt[3]{15}\) .....Incorrect

\(\displaystyle \sqrt[3]{3}\) * \(\displaystyle \sqrt[3]{-20}\) = \(\displaystyle \sqrt[3]{-60}\)

 

[lookagain]

can someone check if this is correct

1) Does \(\displaystyle \ -4\sqrt{6} - \sqrt{6} \ = \ -4\sqrt{6} \ ?\)

zelda1850,

place all of your negative, subtraction, addition, etc. signs inside of the bracketed tex, /tex format
as edited in this quote box. For instance, your subtraction sign looked closer to a multiplication dot.