Evaluate
2\left(x-1\right)\left(x+7\right)
Expand
2x^{2}+12x-14
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2x^{2}+14x-2x-14
Apply the distributive property by multiplying each term of 2x-2 by each term of x+7.
2x^{2}+12x-14
Combine 14x and -2x to get 12x.
2x^{2}+14x-2x-14
Apply the distributive property by multiplying each term of 2x-2 by each term of x+7.
2x^{2}+12x-14
Combine 14x and -2x to get 12x.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
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Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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