Question

1) 6x - 5y - 2z ditambah -8x + 6y + 9z

2) 3(2x pangkat dua - 4x - 5) ditambah 2(4x pangkat dua + 3z - 7)

3) 5y - 3x - 4 dikurangi 5x -3y +7

4) 5x kuadrat - 9xy - 4y kuadrat dikurangi -xkuadrat + 6xy + 3y kuadrat

Answer 1

1) 6x - 5y - 27 + (-8x) + 6y +9z
    = 6x - 8x - 5y + 6y - 2z + 9z
    = -2x + x + 7z
2) 3(2x² - 4x -5) + 2(4x² +3z - 7)
    = 6x² - 12 x - 15 + 8x² + 6z - 14
    = 6x² + 8x² -12x + 6z -15 -14
    = 14x² -12x + 6z - 29
3) 5y - 3x - 4 - 5x - 3y + 7
    = -3x - 5x -3y +5y - 4 +7
    = -8x + 2y +3
4) 5x² - 9xy - 4y² - x² + 6xy - 3y²
    = 5x² - x² - 4y² - 3y² - 9xy + 6xy
    = 4x² - 7y² - 3xy

semoga membantu yaa;)

Answer 2

1. 6x-5y-2z+(-8x)+6y+9z
= 6x+(-8x)-5y+6y-2z+9z
= -2x-1y-7z
2. 3(2x²-4x-5) + 2(4x²+3z-7)
= 6x²-12x-15+8x²+6z-14
= 6x²+8x²-15-14-12x+6z
= 14x²-29-6z
3. (5y-3x-4)-(5x-3y+7)
= 5y-3y-3x-5x-4+7
= 2y-8x+3
4. 5x²-9xy-4y²-x²+6xy+3y²
= 5x²-x²-9xy+6xy-4y²+3y²
= 5-3xy-1y²