Evaluate
\left(x+2\right)\left(x-2i\right)
Expand
x^{2}+\left(2-2i\right)x-4i
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x^{2}+2x-2ix-4i
Apply the distributive property by multiplying each term of x-2i by each term of x+2.
x^{2}+\left(2-2i\right)x-4i
Combine 2x and -2ix to get \left(2-2i\right)x.
x^{2}+2x-2ix-4i
Apply the distributive property by multiplying each term of x-2i by each term of x+2.
x^{2}+\left(2-2i\right)x-4i
Combine 2x and -2ix to get \left(2-2i\right)x.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Matrix
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Simultaneous equation
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Integration
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Limits
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