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Polynomials — Maths STD 10 — Question

CBSE BoardEnglish MediumSTD 10MathsPolynomials5 Marks
Question
Show that (x + 2) is a factor of $f(x) = x^3 + 4x^2 + x - 6.$
✓

Answer

Given: $f(x) = x^3 + 4x^2 + x - 6​​​$
$Now, f(-2) = (-2)^3 + 4(-2)^2 + (-2) - 6$
$= -8 + 16 - 2 - 6$
$= 0$
$\therefore$ (x + 2) is a factor of $f(x) = x^3 + 4x^2 + x - 6.$

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