integral
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[tex] \sf{ \int \: x( x \: + \: 1) ^{2} \: dx } \\ \\ \sf{ = \: \int \: x( {x}^{2} \: + \: 2x \: + \: 1) \: dx \\ \\ } \\ \\ \sf{ = \: \int \: ( {x}^{3} \: + \: 2 {x}^{2} \: + \: x) \: dx} \\ \\ \sf{ = \: \frac{1}{3 + 1} \: {x}^{3 + 1} \: + \: \frac{2}{2 + 1} \: {x}^{2 + 1} \: + \: \frac{1}{1 + 1} \: {x}^{1 + 1} \: + \: c} \\ \\ \sf{ = \: \frac{ {x}^{4}}{4} \: + \: \frac{2 \: {x}^{3} }{3} \: + \: \frac{ {x}^{2} }{2} \: + \: c }[/tex]
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Verified answer
integral
•
[tex] \sf{ \int \: x( x \: + \: 1) ^{2} \: dx } \\ \\ \sf{ = \: \int \: x( {x}^{2} \: + \: 2x \: + \: 1) \: dx \\ \\ } \\ \\ \sf{ = \: \int \: ( {x}^{3} \: + \: 2 {x}^{2} \: + \: x) \: dx} \\ \\ \sf{ = \: \frac{1}{3 + 1} \: {x}^{3 + 1} \: + \: \frac{2}{2 + 1} \: {x}^{2 + 1} \: + \: \frac{1}{1 + 1} \: {x}^{1 + 1} \: + \: c} \\ \\ \sf{ = \: \frac{ {x}^{4}}{4} \: + \: \frac{2 \: {x}^{3} }{3} \: + \: \frac{ {x}^{2} }{2} \: + \: c }[/tex]