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a. (2x+8)+(4x-5-5y) =(2+4)x - 5y +8-5 = 6x - 5y + 3
b. .(3p+q)+(-2p-5p+7) = (3-2-5)p + q + 7 = -4p+q+7
c. (3x²+2x-1)-(x²-5x+6) = 3x²+2x-1-x²+5x-6 = (3-1)x² + (2+5)x -1-6 = 2x²+7x-7
2.
(3x² - 2x + 5) + (x² + 4x - 3) = (3+1)x² +(-2+4)x +5-3 = 4x²+2x+2
3.
a. 2(3x - y) = 6x-2y
b.8 ( -x² + 3 y ) = -8x²+24y
4.
a. (5a)pangkat tiga = 5³a³ = 125a³
b. (2x y)² = 2²x²y² = 4x²y²
c. (4p² - q )² = (4p² - q )(4p² - q ) = 16p^4-8p²q+q²