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Exercise

$\lim_{x\to4}\:\left(x^2-7x+5\right)$

Step-by-step Solution

1

Evaluate the limit $\lim_{x\to4}\left(x^2-7x+5\right)$ by replacing all occurrences of $x$ by $4$

$4^2-7\cdot 4+5$
2

Multiply $-7$ times $4$

$4^2-28+5$
3

Subtract the values $5$ and $-28$

$4^2-23$
4

Calculate the power $4^2$

$16-23$
5

Subtract the values $16$ and $-23$

$-7$

Final answer to the exercise

$-7$

Try other ways to solve this exercise

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  • Solve using L'Hôpital's rule
  • Solve without using l'Hôpital
  • Solve using limit properties
  • Solve using direct substitution
  • Solve the limit using factorization
  • Solve the limit using rationalization
  • Integrate by partial fractions
  • Product of Binomials with Common Term
  • FOIL Method
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$\lim_{x\to-4}\left(\frac{x+4}{x^2-16}\right)$

Main Topic: Limits by Direct Substitution

Find limits of functions at a specific point by directly plugging the value into the function.

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