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b. 2x^2 -X - 6
c. 3x^2 -5x + 2
d. 9x^2 -30x + 25
e. 3x^2 -19x -14 - x^2 +10x = 2x^2-9x -14
f. x^2 +6x +9
g. 25x^2 -10x +1
b.2x²-4x+3x-6=2x²-7x-6
c.3x²-3x-2x-6=3x²-5x-6
d.(3x-5)(3x-5)=9x²-15x-15x+25=9x²-30x+25
e.(sorry lupa :D
f.(x+3)(x+3)= x²+3x+3x+9=x²+6x+9
g.(5x-1)(5x-1)=25x²-5x-5x+1=25x²-10x+1
sebenernya sih masih bisa,, tapi kamu mah ngasih poinnya dikit bgt buat soal sebanyak ini.. :p