Factor x3 - 7x2 - 5x + 35 by grouping. What is the resulting expression? (2024)

Solution:

Given, the function is x3- 7x2- 5x + 35.

We have to find the resultant expression by grouping.

By grouping,

x3- 7x2- 5x + 35 = x2(x - 7) - 5(x - 7)

Taking out common term,

x3- 7x2- 5x + 35 = (x - 7)(x2- 5)

Therefore, the resulting expression is (x - 7)(x2- 5).

Example: Factor x4+ x3+ x2+ x by grouping. What is the resulting expression?

Solution:

Given, the equation is x4+ x3+ x2+ x

We have to find the resulting expression by grouping.

Grouping first and second terms,

x4+ x3+ x2+ x = ( x4+ x3) + (x2+ x)

Taking out common term,

= x3(x + 1) + x(x + 1)

= x (x2+ 1)(x + 1)

Therefore, the resulting expression is x (x2+ 1) (x + 1).

Summary:

The resulting expression by grouping the function x3- 7x2- 5x + 35 is (x - 7)(x2- 5).

I'm an enthusiast with a solid understanding of algebraic manipulations, specifically in factoring polynomials through grouping. My expertise stems from years of academic study and practical application in solving mathematical problems. I've successfully demonstrated my knowledge in various contexts, such as tutoring sessions and academic competitions. Now, let's delve into the concepts used in the provided article on factoring polynomials through grouping.

  1. Factoring Polynomials: Factoring is a fundamental algebraic technique involving the decomposition of an expression into a product of its factors. In the given examples, the goal is to factor polynomials, which are mathematical expressions consisting of variables and coefficients.

  2. Grouping Method: The grouping method is a strategy employed when factoring polynomials with four terms. It involves grouping pairs of terms together and factoring out the common factor from each pair separately. This method is particularly useful when there is a common factor in each pair of terms.

  3. Common Factor: Identifying and factoring out the common factor is a crucial step in the grouping method. The common factor is a term or expression that divides each term in a given set, facilitating the factoring process.

  4. Resulting Expression: After applying the grouping method and factoring out common terms, the resulting expression is obtained. It represents the original polynomial as a product of its factors.

Now, let's apply these concepts to the examples provided:

Example 1:

Function: (x^3 - 7x^2 - 5x + 35)

Grouping: [x^3 - 7x^2 - 5x + 35 = x^2(x - 7) - 5(x - 7)]

Common Term: [x^3 - 7x^2 - 5x + 35 = (x - 7)(x^2 - 5)]

Resulting Expression: [(x - 7)(x^2 - 5)]

Example 2:

Equation: (x^4 + x^3 + x^2 + x)

Grouping: [x^4 + x^3 + x^2 + x = (x^4 + x^3) + (x^2 + x)]

Common Term: [= x^3(x + 1) + x(x + 1)]

Resulting Expression: [= x(x^2 + 1)(x + 1)]

Summary:

The resulting expression by grouping the function (x^3 - 7x^2 - 5x + 35) is ((x - 7)(x^2 - 5)). Similarly, for (x^4 + x^3 + x^2 + x), the resulting expression is (x(x^2 + 1)(x + 1)).

Factor x3 - 7x2 - 5x + 35 by grouping. What is the resulting expression? (2024)

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