What is sqrt((-2)^2+(-4)^2) ?

The solution to sqrt((-2)^2+(-4)^2) is 2sqrt(5)

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simplify sqrt((-2)^2+(-4)^2)

simplify

(- 2)^{2} + (- 4)^{2}

25

Decimal Notation

4.47213 \dots

Solution steps

(- 2)^{2} + (- 4)^{2}

(- 2)^{2} + (- 4)^{2} = 20

= 20

Prime factorization of

20 : 2^{2} \cdot 5

= 2^{2} \cdot 5

Apply radical rule:

ab = a b, a \geq 0, b \geq 0

2^{2} \cdot 5 = 2^{2} 5

= 2^{2} 5

Apply radical rule:

a^{2} = a, a \geq 0

2^{2} = 2

= 25

\frac{3}{5} - \frac{3 - 2 i}{2 + i}

(x + 3) (x - 3) - (x + 5) (x - 5)

1 + 3.32 lo g_{10} (40)

∣ - 5 + 7 ∣

4 (x + h)^{2} + 2 (x + h) - 3