Chapter 9: Q.120 (page 898)

In the following exercises, solve by using the Quadratic Formula: $t^{2} + 13 t = - 40$

Short Answer

Expert verified

The solution of the quadratic equation is $t = - 5; t = - 8$

Step by step solution

Given information

We are given a quadratic equation $t^{2} + 13 t = - 40$

We add 40 on both sides and the identify the values of a,b,c

On adding $40$ on both sides we get

$t^{2} + 13 t + 40 = 0$

On comparing with standard equation we get, $a = 1, b = 13, c = 40$

Write the quadratic formula and the substitute the values in it

The quadratic formula can be given as

$t = \frac{- b \pm \sqrt{b^{2} - 4 a c}}{2 a}$

On substituting the values we get

$t = \frac{- 13 \pm \sqrt{169 - 4 (1) (40)}}{2 (1)}$

Simplify

On simplifying we get

$t = \frac{- 13 \pm \sqrt{169 - 160}}{2} t = \frac{- 13 \pm \sqrt{9}}{2} t = \frac{- 13 \pm 3}{2}$

On further simplifying we get

$t = \frac{- 13 + 3}{2} t = \frac{- 10}{2} t = - 5$ and $t = \frac{- 13 - 3}{2} t = \frac{- 16}{2} t = - 8$

Conclusion

The solution of the above equation is $q = - 5, q = - 8$

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

In the following exercises, solve by using the Quadratic Formula: $t^{2} + 13 t = - 40$

Short Answer

Step by step solution

Given information

We add 40 on both sides and the identify the values of a,b,c

Write the quadratic formula and the substitute the values in it

Simplify

Conclusion

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Geometry

Applied Mathematics

Discrete Mathematics

Statistics

Mechanics Maths

Theoretical and Mathematical Physics

Study anywhere. Anytime. Across all devices.

In the following exercises, solve by using the Quadratic Formula:t2+13t=-40

Short Answer

Step by step solution

Given information

We add 40 on both sides and the identify the values of a,b,c

Write the quadratic formula and the substitute the values in it

Simplify

Conclusion

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Geometry

Applied Mathematics

Discrete Mathematics

Statistics

Mechanics Maths

Theoretical and Mathematical Physics

Study anywhere. Anytime. Across all devices.

In the following exercises, solve by using the Quadratic Formula: $t^{2} + 13 t = - 40$