Question

Simply square root of -112
a. 4 square root of -7
b. 4i square root of 7
c. -4 square root of 7
d. i square root of 112

Answer 1

$\sqrt{-112}=\sqrt{-1\cdot16\cdot7}=\sqrt{-1}\cdot\sqrt{16}\cdot\sqrt7=i\cdot4\cdot\sqrt7=4i\sqrt7$