masterize f4 chapter 5 today and do this exercise.

one of the easiest chapter in maths.

Countdown SPM:
72 days left (10 minggu 2 hari)

Ape guna mimpi besar kalau effort tak sepadan? Mula sekarang bukan nanti! - by Zarith Sofea

HARI INI DALAM OTC TRIAL PTTI

Terbuka untuk semua tingkatan 4, 3, 2 dan 1.

Topik yang wajib faham dalam matematik untuk awak lulus dan pandai matematik.

Rasai pengalaman belajar OTC dengan PTTI secara percuma dalam OTC Trial ini.

Daftar sekarang di https://tinyurl.com/otctrialPTTI

do anyone have maths kbat collection?

dlp

Countdown SPM:
71 days left (10 minggu 1 hari)

SPM gila sama seperti kehidupan tanpa dia ~ by Natasa

📐 FORM 4 MATHEMATICS

CHAPTER 6: LINEAR INEQUALITIES IN TWO VARIABLES

1. What is a linear inequality?

A linear inequality compares two expressions using:

• < — less than
• > — greater than
• ≤ — less than or equal to
• ≥ — greater than or equal to

Types of Boundary Lines 📐
1. Dashed line (— — —) Used for: 
‼️  The points on the line are not included.
2. Solid line (━━━━) Used for: 
‼️  The points on the line are included.

💡 Dashed lines mean the points on the line are not included.
Solid lines mean the points on the line are included.

3. How to draw the graph

Example:

y > x + 2

Step 1: Draw the boundary line:

y = x + 2

Use a dashed line because the sign is >.

Step 2: Choose a test point, usually (0,0).

Substitute:

0 > 0 + 2

0 > 2 False ❌

Step 3: Since (0,0) is false, shade the region opposite the origin.

🌟 Important special cases

y > a

Shade above the horizontal line y=a.

y < a

Shade below the horizontal line y=a.

x > a

Shade to the right of the vertical line x=a.

x < a

Shade to the left of the vertical line x=a.

Changing the inequality sign

When multiplying or dividing both sides by a negative number, reverse the inequality sign.

Example:

-2x > 6

Divide by -2:

x < -3

💡 The sign changes from > to <.

Common mistakes to avoid ⚠️

❌ Using a solid line for < or >

❌ Using a dashed line for => or <=

❌ Shading the wrong side of the boundary line

❌ Forgetting to reverse the sign when dividing by a negative number

❌ Forgetting that the final answer is the overlapping region

⭐ Quick memory tips

• < or > → dashed line

• ≤ or ≥ → solid line

• Test point true → shade that side

• Test point false → shade the opposite side

• Negative × or ÷ → reverse the sign

• Common shaded area → solution region

1. SPM TRIAL 2026 MATEMATIK KERTAS 2 IKUT BAB TINGKATAN 4 & 5 SOALAN + JAWAPAN https://drive.google.com/file/d/1tA3VRkY5sBK3QYvdJnhSS3rvuj8YjozW/view?usp=drive_link

2. SPM TRIAL 2026 MATEMATIK KERTAS 1 IKUT BAB TINGKATAN 1-5 SOALAN + JAWAPAN
https://drive.google.com/file/d/1r68VlqpXwfd15jAPuy8RnLkL24zt5AJX/view?usp=sharing

3. SPM SOALAN SEBENAR 2021-2025 KERTAS 2 MATEMATIK IKUT BAB TINGKATAN 4 & 5 (BONUS ADA TINGKATAN 1-3) SOALAN + JAWAPAN https://drive.google.com/file/d/16g34uU_gj9DC3eUBBKKn8YcuSK1Zu0mY/view?usp=drive_link

4. SPM TRIAL 2026 MATEMATIK TAMBAHAN IKUT BAB TINGKATAN 4 & 5 SOALAN + JAWAPAN https://drive.google.com/file/d/17O5XVfRZrWE4e20bCixxVfNOVfMr_OZ9/view?usp=drive_link

5. SPM SOALAN SEBENAR 2021-2025 MATEMATIK TAMBAHAN IKUT BAB TINGKATAN 4 & 5 SOALAN + JAWAPAN https://drive.google.com/file/d/17O5XVfRZrWE4e20bCixxVfNOVfMr_OZ9/view?usp=drive_link

Countdown SPM:
70 days left (10 minggu)

Nanti bila semua dah tamat, kau akan rindukan masa kau masih ada peluang untuk ubah segalanya.