Expand
3x^{2}-6xy-13x+3y^{2}+13y+4
Evaluate
\left(x-y-4\right)\left(3x-3y-1\right)
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3x^{2}-3xy-x-3yx+3y^{2}+y-12x+12y+4
Apply the distributive property by multiplying each term of x-y-4 by each term of 3x-3y-1.
3x^{2}-6xy-x+3y^{2}+y-12x+12y+4
Combine -3xy and -3yx to get -6xy.
3x^{2}-6xy-13x+3y^{2}+y+12y+4
Combine -x and -12x to get -13x.
3x^{2}-6xy-13x+3y^{2}+13y+4
Combine y and 12y to get 13y.
3x^{2}-3xy-x-3yx+3y^{2}+y-12x+12y+4
Apply the distributive property by multiplying each term of x-y-4 by each term of 3x-3y-1.
3x^{2}-6xy-x+3y^{2}+y-12x+12y+4
Combine -3xy and -3yx to get -6xy.
3x^{2}-6xy-13x+3y^{2}+y+12y+4
Combine -x and -12x to get -13x.
3x^{2}-6xy-13x+3y^{2}+13y+4
Combine y and 12y to get 13y.
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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