Jawab:
Penjelasan dengan langkah-langkah:
a. -4x + 5y - 10x + y = (-4 - 10)x + (5 + 1)y = -14x + 6y
b. (5x + 7) - 3(2x - 5) = 5x + 7 - 6x + 15 = (5 - 6)x + (7 + 15) = -x + 22
c. kx - 2(-4x + 7) = kx + 8x - 14 = (k + 8)x - 14
d. -3(2x - 5) + 2(-x + 4) = -6x + 15 - 2x + 8 = -8x + 23
e. 2x² - 3x + 5 - 3x² + x - 9 = (2 - 3)x² + (-3 + 1)x + (5 - 9)
= -x² - 2x - 4
= -(x² + 2x + 4)
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Jawab:
Penjelasan dengan langkah-langkah:
a. -4x + 5y - 10x + y = (-4 - 10)x + (5 + 1)y = -14x + 6y
b. (5x + 7) - 3(2x - 5) = 5x + 7 - 6x + 15 = (5 - 6)x + (7 + 15) = -x + 22
c. kx - 2(-4x + 7) = kx + 8x - 14 = (k + 8)x - 14
d. -3(2x - 5) + 2(-x + 4) = -6x + 15 - 2x + 8 = -8x + 23
e. 2x² - 3x + 5 - 3x² + x - 9 = (2 - 3)x² + (-3 + 1)x + (5 - 9)
= -x² - 2x - 4
= -(x² + 2x + 4)