Simplify (2 square root of 4)(- square root of 9)(2 square root of 25)

$(2 \sqrt{4}) (- \sqrt{9}) (2 \sqrt{25})$

Rewrite $4$ as $2^{2}$ .

$2 \sqrt{2^{2}} (- \sqrt{9}) (2 \sqrt{25})$

Pull terms out from under the radical, assuming positive real numbers.

$2 \cdot 2 (- \sqrt{9}) (2 \sqrt{25})$

Multiply $2$ by $2$ .

$4 (- \sqrt{9}) (2 \sqrt{25})$

Rewrite $9$ as $3^{2}$ .

$4 (- \sqrt{3^{2}}) (2 \sqrt{25})$

Pull terms out from under the radical, assuming positive real numbers.

$4 (- 1 \cdot 3) (2 \sqrt{25})$

Multiply.

Multiply $- 1$ by $3$ .

$4 \cdot - 3 (2 \sqrt{25})$

Multiply $4$ by $- 3$ .

$- 12 (2 \sqrt{25})$

Rewrite $25$ as $5^{2}$ .

$- 12 (2 \sqrt{5^{2}})$

Pull terms out from under the radical, assuming positive real numbers.

$- 12 (2 \cdot 5)$

Multiply $2$ by $5$ .

$- 12 \cdot 10$

Multiply $- 12$ by $10$ .

$- 120$