Evaluate
15\left(-x^{2}+x-1\right)
Expand
-15x^{2}+15x-15
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-15\left(x^{2}-x+1\right)
Multiply -3 and 5 to get -15.
-15x^{2}+15x-15
Use the distributive property to multiply -15 by x^{2}-x+1.
-15\left(x^{2}-x+1\right)
Multiply -3 and 5 to get -15.
-15x^{2}+15x-15
Use the distributive property to multiply -15 by x^{2}-x+1.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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Matrix
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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
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