Factoring Trinomials with the AC Method

This video tutorial explains how to factor trinomials using the AC method. It begins with an introduction to the problem, where a trinomial has a coefficient of three, making it challenging to guess and check. The tutorial then describes setting up the AC method by multiplying the coefficients and finding two numbers that multiply to AC and add to B. The expression is rewritten using these numbers, and the grouping method is applied to factor the expression. The video concludes with a verification step to ensure the factorization is correct.

What is the first step in factoring a trinomial with a leading coefficient?

• List all factors of the constant term.

• Multiply a and c, then find factors of this product.

• Split the middle term based on its coefficient.

• Identify the trinomial's leading coefficient.

Tags

TEKS.MATH.A.10E

What values do you need to find that multiply to AC and add to B?

• Two numbers that multiply to positive 24.

• Two numbers that multiply to negative 24 and add to 2.

• Two prime numbers.

• Any two numbers.

Tags

TEKS.MATH.A.10E

What does the AC method help to identify in the process of factoring trinomials?

• The coefficients of the original trinomial.

• The factors of the leading coefficient.

• The numbers that multiply to AC and add to B.

• The prime factors of the constant term.

Tags

TEKS.MATH.A.10E

How do you rewrite the original expression using the numbers found from AC method?

• By dividing the middle term.

• By multiplying the numbers with the leading coefficient.

• By adding the numbers to the constant term.

• By splitting the middle term into two parts.

Tags

TEKS.MATH.2A.7E

What is the purpose of the grouping method in factoring trinomials?

• To find the greatest common factor.

• To simplify the trinomial into a binomial.

• To split the middle term effectively.

• To identify the common term in grouped terms.

Tags

TEKS.MATH.2A.7E

After applying the AC method and grouping, what should you do next?

• Factor out the greatest common factor from each group.

• Divide each term by the greatest common factor.

• Multiply each term by the leading coefficient.

• Combine like terms.

Tags

TEKS.MATH.2A.7E

What indicates that you have factored the trinomial correctly using the AC method?

• The constant term is eliminated.

• The leading coefficient becomes 1.

• Both grouped terms have a common factor of x + 2.

• The original expression is unchanged.

Tags

TEKS.MATH.2A.7E

What is the significance of the common term found in both groups during the grouping method?

• It represents the variable part of the trinomial.

• It simplifies the expression into a monomial.

• It is used to rewrite the trinomial as a binomial.

• It indicates the factors of the trinomial.

Tags

TEKS.MATH.2A.7E

What is the result of factoring the trinomial 3x^2 + 2x - 8?

• (3x + 4)(x - 2)

• 3x(x + 2) - 4(x + 2)

• (3x - 4)(x + 2)

• (x + 6)(x - 4)

Tags

TEKS.MATH.A.10E

How can you verify that your factored expression is correct?

• By applying the distributive property.

• By graphing the original and factored expressions.

• By substituting values for x.

• By reversing the factoring process.

Tags

TEKS.MATH.2A.7E