6.1 Areas Between Curves/5

${\begin{aligned}&\color {red}\mathbf {y=x+1} &\color {royalblue}\mathbf {y=9-x^{2}} \\&x=-1&x=2\\\end{aligned}}$

$\int _{-1}^{2}((9-x^{2})-(x+1))dx$ = 9x-\frac{x^{3}}{3}-\frac{x^{2}}{2}

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