Evaluate
x\left(41-x\right)
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41x-x^{2}
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14x^{2}+21x-5x\left(3x-4\right)
Use the distributive property to multiply 7x by 2x+3.
14x^{2}+21x-15x^{2}+20x
Use the distributive property to multiply -5x by 3x-4.
-x^{2}+21x+20x
Combine 14x^{2} and -15x^{2} to get -x^{2}.
-x^{2}+41x
Combine 21x and 20x to get 41x.
14x^{2}+21x-5x\left(3x-4\right)
Use the distributive property to multiply 7x by 2x+3.
14x^{2}+21x-15x^{2}+20x
Use the distributive property to multiply -5x by 3x-4.
-x^{2}+21x+20x
Combine 14x^{2} and -15x^{2} to get -x^{2}.
-x^{2}+41x
Combine 21x and 20x to get 41x.
Examples
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y = 3x + 4
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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
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Limits
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