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6x - 3x + 5 - 6 =
3x - 1
b.(6x-5y-2z) + (-8x+6y+9z) =
6x - 8x - 5y + 6y - 2z + 9z =
-2x + y + 7z
c. 3(2x²-4x+5) + 2(4x²+3x-7) =
(6x² - 12x + 15) + (8x² + 6x - 14) =
6x² + 8x² - 12x + 6x + 15 - 14 =
14x² - 6x + 1
2)
a. 5x²(6x-3y) =
30x³ - 15x²y
b.(2x-2)(x+5) =
2x² + 10x - 2x - 10 =
2x² + 8x - 10
c.(x-5)(x²-4x+20) =
x³ - 4x² + 20x - 5x² + 20x - 100 =
x³ - 4x² - 5x² + 20x + 20x - 100 =
x³ -9x² + 40x - 100
tolong jadikan jawaban terbaik :) trmksh