Wiki

# Bài 4 trang 11 SGK Toán 9 Tập 2 – VietJack.com

## H2 Heading: Understanding Systems of Linear Equations with Two Unknowns

In this article, we will delve into the concept of solving systems of linear equations with two unknowns. We will explore various scenarios and uncover the number of solutions for each system. By the end of this article, you will have a solid understanding of this fundamental mathematical concept.

### H3 Heading: Exploring Different Systems of Linear Equations

Let’s examine different scenarios and solve the following systems of linear equations:

a)
Consider the system:
(d): y = -2x + 3, with a = -2 and b = 3
(d’): y = 3x – 1, with a’ = 3 and b’ = -1

Since a ≠ a’, the lines (d) and (d’) intersect, resulting in a unique solution for the system.

b)
Consider the system:
(d): with a = ; b = 3
(d’): with a’ = ; b’ = 1

Since a = a’ and b ≠ b’, the lines (d) and (d’) are parallel, meaning the system has no solution.

c)
Let’s examine the system:
(d): y = x, with a = ; b = 0
(d’): y = x, with a’ = ; b’ = 0

Since a ≠ a’, the lines (d) and (d’) intersect, leading to a unique solution for the system.

d)
Now, let’s consider the system:
(d): with a = a’ = 3 and b = b’ = -3

We observe that the two lines overlap, indicating that the system of equations has an infinite number of solutions.

## H2 Heading: Applying the Knowledge

For further reference, here are some additional resources related to solving systems of linear equations with two unknowns:

• To explore different solutions for the system discussed in this article, visit Kienthucykhoa.com.
• Dive into other exercises and solutions for Chapter 3 in the Grade 9 Mathematics textbook.
• Discover various practice exercises that will enhance your understanding of solving systems of linear equations.

## H3 Heading: Latest Shopee Discount Codes

Here are the latest discount codes available for Shopee:

• XMen For Boss at only 60k per bottle.
• SRM Simple offers a free makeup remover worth 50k.
• Combo Deal: TRESEMME Shampoo and Conditioner for only 80k.

To expand your knowledge further, check out these additional articles on Kienthucykhoa.com:

• Solve math, literature, and English multiple-choice questions for Grade 9, complete with answers.

Remember, practice is key to mastering these mathematical concepts. Keep exploring and honing your skills to achieve excellence in mathematics.