Evaluate
-\left(x+4\right)\left(3x+1\right)
Expand
-3x^{2}-13x-4
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-15x-5+\left(3x+1\right)\left(-x+1\right)
Use the distributive property to multiply 3x+1 by -5.
-15x-5+3x\left(-x\right)+3x-x+1
Apply the distributive property by multiplying each term of 3x+1 by each term of -x+1.
-12x-5+3x\left(-x\right)-x+1
Combine -15x and 3x to get -12x.
-12x-4+3x\left(-x\right)-x
Add -5 and 1 to get -4.
-12x-4+3x^{2}\left(-1\right)-x
Multiply x and x to get x^{2}.
-12x-4-3x^{2}-x
Multiply 3 and -1 to get -3.
-13x-4-3x^{2}
Combine -12x and -x to get -13x.
-15x-5+\left(3x+1\right)\left(-x+1\right)
Use the distributive property to multiply 3x+1 by -5.
-15x-5+3x\left(-x\right)+3x-x+1
Apply the distributive property by multiplying each term of 3x+1 by each term of -x+1.
-12x-5+3x\left(-x\right)-x+1
Combine -15x and 3x to get -12x.
-12x-4+3x\left(-x\right)-x
Add -5 and 1 to get -4.
-12x-4+3x^{2}\left(-1\right)-x
Multiply x and x to get x^{2}.
-12x-4-3x^{2}-x
Multiply 3 and -1 to get -3.
-13x-4-3x^{2}
Combine -12x and -x to get -13x.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}