This is similar to Problem 1 from your Section 4.3 worksheet.

For each expression, identify the greatest common factor. Make sure the coefficient of the GCF is positive.

(a) $54-9 x$
GCF:

(b) $112 x - 15$
GCF:

(c) $26 x^2+58 x^4$
GCF:

(d) $28 x^{10}-14 x^{12} - 42 x^6$
GCF:

(e) $58 ab^3-19 a^2b + 35 a^2b^2$
GCF:

Hint: