simplify (-2a)^2

Solution

simplify

(- 2 a)^{2}

4 a^{2}

Solution steps

(- 2 a)^{2}

Apply exponent rule:

(- a)^{n} = a^{n},

n

is even

(- 2 a)^{2} = (2 a)^{2}

= (2 a)^{2}

Apply exponent rule:

(a \cdot b)^{n} = a^{n} b^{n}

(2 a)^{2} = 2^{2} a^{2}

= 2^{2} a^{2}

2^{2} = 4

= 4 a^{2}

(2 + 5 i) (1 - 3 i)

\frac{2}{15} 405 - \frac{1}{6} 128 - \frac{1}{10} 125 + 332

x^{3} + 2 x^{2} - x \cdot x^{2} - 2 x + 5

2.1 a^{2} - 2.1 b^{2}

3 \cdot \frac{8}{13} \cdot \frac{4}{11} \cdot \frac{22}{16}