BuyFind

Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071
BuyFind

Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

Solutions

Chapter 1.5, Problem 86E
To determine

Find the real solutions of equation.

Expert Solution

Answer to Problem 86E

  x=5,x=32

Explanation of Solution

Given information:

  10x12x3+4=0

Formula used: -

First, we will solve this equation by cross multiplication method and then we will find value of x.

  x=b±b24ac2a

  10x12x3=4

Now by applying cross multiplication method:

  10x12x3=410x3012xx(x3)=42x30x23x=42x30=4x2+12x

  4x214x30=0

Now applying quadratic formula:

  x=b±b24ac2a In equation 4x214x30=0

Here a=4,b=14,c=30

  x=(14)±(14)24(4)(30)2(4)x=14±196+4808x=14±6762x=14±268

  x=5,x=32

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