Evaluate
21x^{2}-51x-14
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21x^{2}-51x-14
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12x^{2}-57x-15+9x^{2}+6x+1
Use the distributive property to multiply 12x+3 by x-5 and combine like terms.
21x^{2}-57x-15+6x+1
Combine 12x^{2} and 9x^{2} to get 21x^{2}.
21x^{2}-51x-15+1
Combine -57x and 6x to get -51x.
21x^{2}-51x-14
Add -15 and 1 to get -14.
12x^{2}-57x-15+9x^{2}+6x+1
Use the distributive property to multiply 12x+3 by x-5 and combine like terms.
21x^{2}-57x-15+6x+1
Combine 12x^{2} and 9x^{2} to get 21x^{2}.
21x^{2}-51x-15+1
Combine -57x and 6x to get -51x.
21x^{2}-51x-14
Add -15 and 1 to get -14.
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{ x } ^ { 2 } - 4 x - 5 = 0
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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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