Calculus Examples

$lim_{x \to 8} x \sqrt{x^{2} + 2 x} - 2 \sqrt{x^{2} + x} + x$

Step 1

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $8$ .

$lim_{x \to 8} x \sqrt{x^{2} + 2 x} - lim_{x \to 8} 2 \sqrt{x^{2} + x} + lim_{x \to 8} x$

Step 2

Split the limit using the Product of Limits Rule on the limit as $x$ approaches $8$ .

$lim_{x \to 8} x \cdot lim_{x \to 8} \sqrt{x^{2} + 2 x} - lim_{x \to 8} 2 \sqrt{x^{2} + x} + lim_{x \to 8} x$

Step 3

Move the limit under the radical sign.

$lim_{x \to 8} x \cdot \sqrt{lim_{x \to 8} x^{2} + 2 x} - lim_{x \to 8} 2 \sqrt{x^{2} + x} + lim_{x \to 8} x$

Step 4

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $8$ .

$lim_{x \to 8} x \cdot \sqrt{lim_{x \to 8} x^{2} + lim_{x \to 8} 2 x} - lim_{x \to 8} 2 \sqrt{x^{2} + x} + lim_{x \to 8} x$

Step 5

Move the exponent $2$ from $x^{2}$ outside the limit using the Limits Power Rule.

$lim_{x \to 8} x \cdot \sqrt{{(lim_{x \to 8} x)}^{2} + lim_{x \to 8} 2 x} - lim_{x \to 8} 2 \sqrt{x^{2} + x} + lim_{x \to 8} x$

Step 6

Move the term $2$ outside of the limit because it is constant with respect to $x$ .

$lim_{x \to 8} x \cdot \sqrt{{(lim_{x \to 8} x)}^{2} + 2 lim_{x \to 8} x} - lim_{x \to 8} 2 \sqrt{x^{2} + x} + lim_{x \to 8} x$

Step 7

Move the term $2$ outside of the limit because it is constant with respect to $x$ .

$lim_{x \to 8} x \cdot \sqrt{{(lim_{x \to 8} x)}^{2} + 2 lim_{x \to 8} x} - 2 lim_{x \to 8} \sqrt{x^{2} + x} + lim_{x \to 8} x$

Step 8

Move the limit under the radical sign.

$lim_{x \to 8} x \cdot \sqrt{{(lim_{x \to 8} x)}^{2} + 2 lim_{x \to 8} x} - 2 \sqrt{lim_{x \to 8} x^{2} + x} + lim_{x \to 8} x$

Step 9

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $8$ .

$lim_{x \to 8} x \cdot \sqrt{{(lim_{x \to 8} x)}^{2} + 2 lim_{x \to 8} x} - 2 \sqrt{lim_{x \to 8} x^{2} + lim_{x \to 8} x} + lim_{x \to 8} x$

Step 10

Move the exponent $2$ from $x^{2}$ outside the limit using the Limits Power Rule.

$lim_{x \to 8} x \cdot \sqrt{{(lim_{x \to 8} x)}^{2} + 2 lim_{x \to 8} x} - 2 \sqrt{{(lim_{x \to 8} x)}^{2} + lim_{x \to 8} x} + lim_{x \to 8} x$

Step 11

Evaluate the limits by plugging in $8$ for all occurrences of $x$ .

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Step 11.1