Evaluate
-39
Factor
-39
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-3\left(2-\left(-15\right)\right)-4\left(-3\right)
Multiply 5 and -3 to get -15.
-3\left(2+15\right)-4\left(-3\right)
The opposite of -15 is 15.
-3\times 17-4\left(-3\right)
Add 2 and 15 to get 17.
-51-4\left(-3\right)
Multiply -3 and 17 to get -51.
-51-\left(-12\right)
Multiply 4 and -3 to get -12.
-51+12
The opposite of -12 is 12.
-39
Add -51 and 12 to get -39.
Examples
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{ 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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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}