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การสอนเรื่อง การแยกตัวประกอบฯ

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This document contains 5 equations that can be simplified by factorizing the expressions on both sides of the equal sign. Each equation starts with an expression containing x squared terms on the left side of the equal sign and can be rewritten as the difference of two squares on the right side of the equal sign by factorizing the expressions.

2
ax2 + bx + c a 0 , c
0 b = 0
x2- d2 d
A2 – B2 A , B
x2- d2 A2 – B2
“ ”

2
1) x2 – 16
x2 – 16 = x2 – 42
2) x2 – 49
x2 – 49 = x2 –
72
3) 169 - x2
169 - x2 = 132 – x2

2
4) 121 - x2
121 - x2 =
112 – x2 5)

2
1
1
1

2
2

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การสอนเรื่อง การแยกตัวประกอบฯ

1. 2 ax2 + bx + c a 0 , c 0 b = 0 x2- d2 d A2 – B2 A , B x2- d2 A2 – B2 “ ”

2. 2 1) x2 – 16 x2 – 16 = x2 – 42 2) x2 – 49 x2 – 49 = x2 – 72 3) 169 - x2 169 - x2 = 132 – x2

3. 2 4) 121 - x2 121 - x2 = 112 – x2 5)