Jawaban:
1a. -4x + 5y - 10x + y
= -14x + 6y
1b. (5x + 7) - 3(2x - 5)
= 5x + 7 - 6x + 15
= -x + 22
1c. 8x - 2(-4x + 7)
= 8x + 8x - 14
= 16x - 14
1d. -3(2x - 5) + 2(-x + 4)
= -6x + 15 - 2x + 8
= -8x + 23
1e. 2x² - 3x + 5 - 3x² + x - 9
= -x² - 2x - 4
2a. (2x - 1) (-3x + 4)
= -6x² + 8x + 3x - 4
= -6x² + 11x - 4
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Jawaban:
1a. -4x + 5y - 10x + y
= -14x + 6y
1b. (5x + 7) - 3(2x - 5)
= 5x + 7 - 6x + 15
= -x + 22
1c. 8x - 2(-4x + 7)
= 8x + 8x - 14
= 16x - 14
1d. -3(2x - 5) + 2(-x + 4)
= -6x + 15 - 2x + 8
= -8x + 23
1e. 2x² - 3x + 5 - 3x² + x - 9
= -x² - 2x - 4
2a. (2x - 1) (-3x + 4)
= -6x² + 8x + 3x - 4
= -6x² + 11x - 4