Find the greatest common factors (GCF / HCF) of the following polynomials :

$4 a^{2} b^{3}, - 12 a^{3} b, 18 a^{4} b^{3}$

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Solution

$4 a^{2} b^{3}, - 12 a^{3} b, 18 a^{4} b^{3}$

HCF of 4, 12, 18 = 2

HCF of $a^{2}, a^{3}, a^{4} = a^{2}$

HCF of $b^{3}, b, b^{3} = b$

$∴ HCF = 2 a^{2} b$

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