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=.
Untuk x = 1
= 2=
6. KPK bentuk aljabar 5xy² dan 25x²y = 25x²y²
7. (2 - t)(2t + 3), t = 3 >> (2 - 3)(2x3 + 3) = 12+6-18-9 = -9
8. a = 1, b = -1, c = 2
2ab + bc - 3ac² = (2x1x-1)+(-1x2) -(3x1x4) = -2-2-12 = - 16