Evaluate
\left(r-1\right)^{2}
Expand
r^{2}-2r+1
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\left(r-1\right)^{2}
Multiply r-1 and r-1 to get \left(r-1\right)^{2}.
r^{2}-2r+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(r-1\right)^{2}.
\left(r-1\right)^{2}
Multiply r-1 and r-1 to get \left(r-1\right)^{2}.
r^{2}-2r+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(r-1\right)^{2}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Matrix
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Simultaneous equation
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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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