Word Count : 314

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The integral to evaluate is: $$ \int_{8.4}^{10.4} (5x + 4x^2 + 3) \, dx $$ Let us solve it numerically using $n = 4$ subintervals for clarity. The width of each subinterval is: $$ h = \frac{10.4 - 8.4}{4} = \frac{2}{4} = 0.5 $$ The points are: $x_0 = 8.4, x_1 = _____ ______ __________ _______ __________ ____.
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