Evaluate
\left(x+4\right)\left(3x+1\right)
Expand
3x^{2}+13x+4
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3x^{2}+12x+x+4
Apply the distributive property by multiplying each term of 3x+1 by each term of x+4.
3x^{2}+13x+4
Combine 12x and x to get 13x.
3x^{2}+12x+x+4
Apply the distributive property by multiplying each term of 3x+1 by each term of x+4.
3x^{2}+13x+4
Combine 12x and x to get 13x.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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Matrix
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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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