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Popular >

simplify 4sqrt(-81)

Solution

simplify

4 - 81

Solution

36 i

Solution steps

4 - 81

Apply radical rule:

- a = a - 1

- 81 = 81 - 1

= 481 - 1

Apply imaginary number rule:

- 1 = i

= 481 i

81 = 9

= 4 \cdot 9 i

Multiply the numbers:

4 \cdot 9 = 36

= 36 i

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Frequently Asked Questions (FAQ)

What is 4sqrt(-81) ?
The solution to 4sqrt(-81) is 36i