Factor
4\left(-t-7\right)\left(t-7\right)
Evaluate
196-4t^{2}
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4\left(49-t^{2}\right)
Factor out 4.
\left(7-t\right)\left(7+t\right)
Consider 49-t^{2}. Rewrite 49-t^{2} as 7^{2}-t^{2}. The difference of squares can be factored using the rule: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).
\left(-t+7\right)\left(t+7\right)
Reorder the terms.
4\left(-t+7\right)\left(t+7\right)
Rewrite the complete factored expression.
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
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Limits
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