1. bentuk sederhana dari 5xy + 6x²y+ 3x²y - 5xy adalah... 2. bentuk paling sederhana dari 5r²y - 3ry² - 7r²y - 6ry² adalah... 3. hasil pengurangan 3r² - 4r -

1. <=> 5xy + 6x²y + 3x²y - 5xy
    <=> 5xy - 5xy + 6x²y + 3x²y
    <=> 9 x²y
2. <=>5r²y - 3ry²-7r²y-6ry²
    <=> 5r²y -7r²y - 3ry² -6ry²
    <=> -2r²y - 9ry²
    <=> - ry (2r + 9y)
3. (3r² -4r-2) - (3r²-6r-8)
 <=> 3r² -4r-2 - 3r²+6r+8
<=> 3r²-3r² - 4r + 6r -2+8
<=> 2r +6
4. A -B
= (-7x +5) - (2x-3)
= -7x -2x + 5 - (-3)
= -9x +8
5. (4x + 5y-8z) + (x -2y -3z)
 = 4x + x + 5y -2y -8z -3z
= 5x + 3y -11z