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