Evaluate
\left(2+i\right)x-12
Expand
\left(2+i\right)x-12
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2x+ix-3i-12+3i
Use the distributive property to multiply x-3 by i.
2x+ix-12+\left(-3+3\right)i
Combine the real and imaginary parts.
2x+ix-12
Add -3 to 3.
\left(2+i\right)x-12
Combine 2x and ix to get \left(2+i\right)x.
2x+ix-3i-12+3i
Use the distributive property to multiply x-3 by i.
2x+ix-12+\left(-3+3\right)i
Combine the real and imaginary parts.
2x+ix-12
Add -3 to 3.
\left(2+i\right)x-12
Combine 2x and ix to get \left(2+i\right)x.
Examples
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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