What is sqrt(-4)*sqrt(-25) ?

The solution to sqrt(-4)*sqrt(-25) is -10

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simplify sqrt(-4)*sqrt(-25)

simplify

- 4 \cdot - 25

- 10

Solution steps

- 4 - 25

- 4 = 2 i

= 2 i - 25

- 25 = 5 i

= 2 i 5 i

Multiply the numbers:

2 \cdot 5 = 10

= 10 ii

Apply exponent rule:

aa = a^{2}

ii = i^{2}

= 10 i^{2}

Apply imaginary number rule:

i^{2} = - 1

= 10 (- 1)

Multiply the numbers:

10 (- 1) = - 10

= - 10

5^{- 6}

5 b + b c

(x + 2) (x + 5) = - 2

2 x^{2} - 3 x - 7 = 0

(z + 7)^{2} = - 81