Solve 5sqrt{4(12-21)}

$$5 \sqrt{ 4(12-21) }$$

Evaluate (complex solution)

$$30i$$

Solution Steps

Subtract 21 from 12 to get -9.

$$5\sqrt{4\left(-9\right)}$$

Multiply 4 and -9 to get -36.

$$5\sqrt{-36}$$

Calculate the square root of -36 and get 6i.

$$5\times \left(6i\right)$$

Multiply 5 and 6i to get 30i.

$$30i$$

Real Part (complex solution)

$$0$$

Solution Steps

Subtract 21 from 12 to get -9.

$$Re(5\sqrt{4\left(-9\right)})$$

Multiply 4 and -9 to get -36.

$$Re(5\sqrt{-36})$$

Calculate the square root of -36 and get 6i.

$$Re(5\times \left(6i\right))$$

Multiply 5 and 6i to get 30i.

$$Re(30i)$$

The real part of 30i is 0.

$$0$$

Evaluate

$$\text{Indeterminate}$$