Page 35 - e-math book 4

2. 5x – 3y +7 dari 5y – 3x – 4

= (5x – 3y +7) - (5y – 3x – 4)
= 5x + 3x -3y - 5y + 7 + 4

= 8x - 8y + 11

3. (2x – 3)(x + 5) = 2 + 10x - 3x - 15
= 2 + 7x - 15

4. 4 + 16x + 15 oleh (2x + 5) = 2x + 3

5.

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