Question

Помогите решить математику,срочно,можно не все :)

Answer 1

$frac{14x^2y-7xy}{2x^2y-2y}= frac{7xy(2x-1)}{2y(x^2-1)}= frac{7x(2x-1)}{2x^2-2}; \ frac{x^3+27}{x+3}= frac{(x+3)(x^2-3x+9)}{x+3} =x^2-3x+9 \ frac{x^3-64}{x^2+4x+16}= frac{(x-4)(x^2+4x+16)}{(x^2+4x+16)}=x-4 \ \ frac{x^4-8x}{x^2-2x}= frac{x(x-2)(x^2+2x+4)}{x(x-2)} =x^2+2x+4 \ \ (4-a)^{2}=16-8a-a^2 \ \ (2x+3)^{2} =4x^2+12x+9 \ \ (7x-2y)^{2}=49x^2-28xy+4y^2 \ \ (a^2-64)=(a-8)(a+8) \ \ 49-4x^2=(7-2x)(7+2x) \ \ 25y^2-36x^{2}=(5y-6x)(5y+6x)$