Ответ:
A) 3x*(-x+3)
-3x²+9x
b) x*x+3x-7x-7*3
x²+3x-7x-21
x²-4x-21
в) 2y*5y-2y*6+5y-6
10y²-12y+5y-6
10y²-7y-6
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Verified answer
Ответ:
A) 3x*(-x+3)
-3x²+9x
b) x*x+3x-7x-7*3
x²+3x-7x-21
x²-4x-21
в) 2y*5y-2y*6+5y-6
10y²-12y+5y-6
10y²-7y-6