High School

Which of the trinomials below has [tex]3x^2[/tex] as the GCF of its terms?

A. [tex]9x^5 - 18x^4 + 27x^3[/tex]

B. [tex]3x^4 + 9x^3 - 6x^2[/tex]

C. [tex]9x^4 + 12x^3 - 6x[/tex]

D. [tex]3x^5 + 9x^4 - 6x^3[/tex]

Answer :

Option B, which is 3x⁴ + 9x³ − 6x², has 3x² as the Greatest Common Factor of its terms.

The question asks which of the given trinomials has 3x² as the Greatest Common Factor (GCF) of its terms. The GCF is the highest monomial that divides evenly into each term of the polynomial.

Let's analyze each option:

  • A. 9x⁵ − 18x⁴ + 27x³ does not have 3x² as the GCF because the smallest exponent of x is 3, and the coefficients have a GCF of 9.
  • B. 3x⁴ + 9x³ − 6x² does have 3x² as the GCF because every term can be divided by 3x², leaving us with whole numbers and variables with non-negative exponents in the simplified form.
  • C. 9x⁴ + 12x³ − 6x does not have 3x² as the GCF because the last term does not contain the variable x squared.
  • D. 3x⁵ + 9x⁴ − 6x³ does not have 3x² as the GCF for similar reasons as option A, where the smallest exponent of x is 3, and the coefficients have a GCF of 3.

Therefore, the answer is B. 3x⁴ + 9x³ − 6x².