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7th Edition

Alexander + 2 others

Publisher: Cengage,

ISBN: 9781337614085

Chapter A.4, Problem 38E

Textbook Problem

Determine the length

Expert Solution

To determine

**To find:**

The length ‘

Solving an equation is to find the value of the unknown variables in the equation, such that the obtained value or values of the unknown should satisfy the equation from which it was derived. Such a value is said to be the solution for the equation. In general a quadratic equation has two solutions for the variable in the equation as the degree of the equation is two.

**Calculation:**

Given,

Apply the distributive property of multiplication over addition.

Add;

The above equation is in the standard form of a quadratic equation.

Now, we shall proceed with the factorization of the quadratic expression in the left of the equation.

First look for the common factor

But, here the

Thus, we have to factor the above equation by the reverse FOIL method.

First factorize the product of the coefficient of the first tern and the constant, such that the sum of the factors gives the coefficient of the middle term.

Thus, factorize

Now, split the middle term

Hence, the equation becomes,

Factor out the common factors form the first two terms and form the last two terms of the above expression

Elementary Geometry For College Students, 7e

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A.1 - The area of an enclosed plot of ground that a...Ch. A.1 - The degree measures of the angles of a triangle...Ch. A.1 - The right circular cylinder shown in the...Ch. A.2 - In Exercises 1 to 6, simplify by combining similar...Ch. A.2 - In Exercises 1 to 6, simplify by combining similar...Ch. A.2 - In Exercises 1 to 6, simplify by combining similar...Ch. A.2 - In Exercises 1 to 6, simplify by combining similar...Ch. A.2 - In Exercises 1 to 6, simplify by combining similar...Ch. A.2 - In Exercises 1 to 6, simplify by combining similar...Ch. A.2 - In Exercises 7 to 12, simplify by using the FOIL...Ch. A.2 - In Exercises 7 to 12, simplify by using the FOIL...Ch. A.2 - In Exercises 7 to 12, simplify by using the FOIL...Ch. A.2 - In Exercises 7 to 12, simplify by using the FOIL...Ch. A.2 - In Exercises 7 to 12, simplify by using the FOIL...Ch. A.2 - In Exercises 7 to 12, simplify by using the FOIL...Ch. A.2 - In Exercises 13 to 16, evaluate each expression....Ch. A.2 - In Exercises 13 to 16, evaluate each expression....Ch. A.2 - In Exercises 13 to 16, evaluate each expression....Ch. A.2 - In Exercises 13 to 16, evaluate each expression....Ch. A.2 - In Exercises 17 to 20, find the value of the...Ch. A.2 - In Exercises 17 to 20, find the value of the...Ch. A.2 - In Exercises 17 to 20, find the value of the...Ch. A.2 - In Exercises 17 to 20, find the value of the...Ch. A.2 - In Exercises 21 to 32, solve each equation....Ch. A.2 - In Exercises 21 to 32, solve each equation. 3x3=6Ch. A.2 - In Exercises 21 to 32, solve each equation. y3+2=6Ch. A.2 - In Exercises 21 to 32, solve each equation....Ch. A.2 - In Exercises 21 to 32, solve each equation....Ch. A.2 - In Exercises 21 to 32, solve each equation. b=27b2Ch. A.2 - In Exercises 21 to 32, solve each equation....Ch. A.2 - In Exercises 21 to 32, solve each equation....Ch. A.2 - In Exercises 21 to 32, solve each equation. x3x2=5Ch. A.2 - In Exercises 21 to 32, solve each equation....Ch. 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