Simplify. Write your answers in the form of a+bi, where a and b are real numbers.
-$$\sqrt { - 25 } \cdot \sqrt { - 64 }$$
A) $- 40$
B) 40
C) $40 \mathrm { i } ^ { 2 }$
D) $- 40 \mathrm { i }$

Question

Quizplus · Accepted Answer

The product of two square roots of negative numbers $\sqrt{-25} \cdot \sqrt{-64}$ can be simplified as $\sqrt{25}i \cdot \sqrt{64}i = 5i \cdot 8i = 40i^2$. Since $i^2 = -1$, the expression simplifies to $40 \cdot -1 = -40$.

Simplify Write Your Answers in the Form of A+bi, Where −25⋅−64\sqrt { - 25 } \cdot \sqrt { - 64 }−25​⋅−64​

Simplify Write Your Answers in the Form of A+bi, Where $\sqrt { - 25 } \cdot \sqrt { - 64 }$