Grade 12 · Math
Evaluate a polynomial limit practice
Use continuity to evaluate a polynomial limit by substitution.
Opening your practice adventure…
Try a sample
Find the limit of 2x2 + (5)x + (3) as x approaches -3.
- 6
- 7
- 5
- 8
See the answer & why
6
Polynomials are continuous. Substitute x=-3: 2(-3)2 + (5)(-3) + (3) = 6.
A little hint: For a polynomial, evaluate at the approached value.
A teaching tip
Check that the expression is a polynomial, then substitute carefully with parentheses.