Section 4 4 Factoring Quadratic Expressions Factors of
- Slides: 29
Section 4. 4 – Factoring Quadratic Expressions Factors of a given number are numbers that have a product equal to the given numbers. Factors of a given expression are expressions that have a product equal to the given expression. Factoring is rewriting an expression as a product of its factors.
Section 4. 4 – Factoring Quadratic Expressions Essential Understanding: You can use the Distributive Property or the FOIL method to multiply two binomials. (x + 4)(x+2) = _______
Section 4. 4 – Factoring Quadratic Expressions Essential Understanding: To factor x 2 + 6 x + 8, think FOIL in reverse. Find two binomials for which the first terms have the product of x 2, the products of the outer and the inner have the sum of 6 x, and the last terms have the product of 8. x 2 + 6 x + 8 = __________
Section 4. 4 – Factoring Quadratic Expressions Problem 1: What is the expression in factored form? x 2 + 9 x + 20
Section 4. 4 – Factoring Quadratic Expressions Problem 1: What is the expression in factored form? x 2 + 14 x – 72
Section 4. 4 – Factoring Quadratic Expressions Problem 1: What is the expression in factored form? -x 2 + 13 x – 12
Section 4. 4 – Factoring Quadratic Expressions Problem 1: What is the expression in factored form? x 2 – 11 x + 30
Section 4. 4 – Factoring Quadratic Expressions Problem 1: What is the expression in factored form? -x 2 + 14 x + 32
Section 4. 4 – Factoring Quadratic Expressions The greatest common factor (GCF) of an expression is a common factor of the terms in the expression. It is the common factor with the greatest coefficient and the greatest exponent.
Section 4. 4 – Factoring Quadratic Expressions Problem 2: What is the expression in factored form? 6 n 2 + 9 n
Section 4. 4 – Factoring Quadratic Expressions Problem 2: What is the expression in factored form? 4 x 2 + 20 x – 56
Section 4. 4 – Factoring Quadratic Expressions Problem 2: What is the expression in factored form? 7 m 2 – 21
Section 4. 4 – Factoring Quadratic Expressions Problem 2: What is the expression in factored form? 9 x 2 + 9 x – 18
Section 4. 4 – Factoring Quadratic Expressions Problem 2: What is the expression in factored form? 4 x 2 + 8 x + 12
Section 4. 4 – Factoring Quadratic Expressions Problem 3: What is the expression in factored form? 2 x 2 + 11 x + 12
Section 4. 4 – Factoring Quadratic Expressions Problem 3: What is the expression in factored form? 4 x 2 – 4 x – 3
Section 4. 4 – Factoring Quadratic Expressions Problem 3: What is the expression in factored form? 4 x 2 +7 x + 3
Section 4. 4 – Factoring Quadratic Expressions Problem 3: What is the expression in factored form? 2 x 2 – 7 x + 6
Section 4. 4 – Factoring Quadratic Expressions Problem 3: What is the expression in factored form? 2 x 2 +2 x + 2
Section 4. 4 – Factoring Quadratic Expressions A perfect square trinomial is a trinomial that is the square of a binomial. For example, x 2 + 10 x + 25 = (x+5)2
Section 4. 4 – Factoring Quadratic Expressions If ax 2 +bx +c is a perfect square trinomial, then ax 2 and c are squares of the terms of the binomial and thus are both positive. bx is twice the product of the terms of the binomial.
Section 4. 4 – Factoring Quadratic Expressions
Section 4. 4 – Factoring Quadratic Expressions Problem 4: What is x 2 – 6 x + 9 in factored form
Section 4. 4 – Factoring Quadratic Expressions Problem 4: What is 64 x 2 +16 x + 1 in factored form
Section 4. 4 – Factoring Quadratic Expressions Problem 4: What is 4 x 2 – 20 x + 25 in factored form
Section 4. 4 – Factoring Quadratic Expressions The expression a 2 – b 2 is the difference of two squares. There is a pattern to its factors.
Section 4. 4 – Factoring Quadratic Expressions Problem 5: What is 25 x 2 – 49 in factored form?
Section 4. 4 – Factoring Quadratic Expressions Problem 5: What is 16 x 2 – 81 in factored form?
Section 4. 4 – Factoring Quadratic Expressions Problem 5: What is 81 x 2 + 49 in factored form?
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