What is simplify-2i*(-2)i ?

The solution to simplify-2i*(-2)i is -4

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simplify-2i*(-2)i

simplify

- 2 i \cdot (- 2) i

- 4

Solution steps

- 2 i (- 2) i

Multiply the numbers:

2 (- 2) = - 4

= - (- 4) ii

Apply exponent rule:

aa = a^{2}

ii = i^{2}

= - (- 4) i^{2}

Remove parentheses:

- (- 4) i^{2} = 4 i^{2}

= 4 i^{2}

Apply imaginary number rule:

i^{2} = - 1

= 4 (- 1)

Multiply the numbers:

4 (- 1) = - 4

= - 4

\frac{1}{x ^{2}} \cdot x^{2}

(x + 1) (x + 2) - (x + 3)^{2} + (x - 3)^{2} - (x - 4) (x - 5)

\frac{x ^{2} - y ^{2}}{x ^{4} - y ^{4}}

\frac{4}{5 - 2}

sin (θ) + cot (θ) cos (θ)