Преобразуйте в многочлен. 1)(5-b)(5+b)-2b(b-3) 2) -5y(y+3)+(y-4)^2 3) 3(x-2)^2-3x^2

Question

Преобразуйте в многочлен. 1)(5-b)(5+b)-2b(b-3) 2) -5y(y+3)+(y-4)^2 3) 3(x-2)^2-3x^2

Answer 1

1) =  25 - B^2 - 2B^2 + 6B = - 3B^2 + 6B + 25 
-----------------------------------------------------
2) = - 5Y^2 - 15Y + Y^2 - 8Y + 16 = - 4Y^2 - 23Y + 16 
---------------------------------------------------
3) = 3 * ( X^2 - 4X + 4) - 3X^2 = 3X^2 - 12X + 12 - 3X^2 = - 12X + 12