√-81 * √-8 + cube√256?

0 ⤊

i need the step by step help... especially for the cube root of 256.... i don't get how to do those... what about the 8 root of 16 or 9 root of 64???

2007-12-06 05:36:23 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

= 9i * 2i√2 +4cube√4
= -18√2 + 4cube√4

2007-12-06 05:44:16 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋

You can't take the √ of a negative number so your solution is DNE (does not exist).

2007-12-06 05:44:16 · answer #2 · answered by Matty B 3 · 0⤊ 1⤋