Add and .

Add and .

Subtract from .

Add and .

Rewrite as .

Multiply by .

Subtract from .

Add and .

Simplify x^2-4x-5ix-4x+5ix+16+20i-20i-25i^2

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# Simplify x^2-4x-5ix-4x+5ix+16+20i-20i-25i^2

Add and .

Add and .

Subtract from .

Add and .

Rewrite as .

Multiply by .

Subtract from .

Add and .

Simplify x^2-4x-5ix-4x+5ix+16+20i-20i-25i^2