Question

What is the simplified form of the expression square root of -64

Answer 1

What is the simplified form of the expression square root of -64

we have

$\sqrt[]{-64}$

Remember that

64=2^6

and

i^2=-1

substitute

$\sqrt[]{-64}=\sqrt[]{(-1)(2^6)}=\sqrt[]{i^2\cdot2^6}=2^3i=8i$

option B