Evaluate
20+5y+21x-6x^{2}
Expand
20+5y+21x-6x^{2}
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27+7\left(3x-1\right)+5y-6x^{2}
Calculate 3 to the power of 3 and get 27.
27+21x-7+5y-6x^{2}
Use the distributive property to multiply 7 by 3x-1.
20+21x+5y-6x^{2}
Subtract 7 from 27 to get 20.
27+7\left(3x-1\right)+5y-6x^{2}
Calculate 3 to the power of 3 and get 27.
27+21x-7+5y-6x^{2}
Use the distributive property to multiply 7 by 3x-1.
20+21x+5y-6x^{2}
Subtract 7 from 27 to get 20.
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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