Решите: (5a^2b-1/4ab^2)(5a^2b+1/4ab^2). решите уравнение: x^2-8x+16=0. разложите на множители: 1,69у^14-900z^8. : (c-2)(3--c)(5+c). (x-5)-x(x+3).

(5a^2b-1/4ab^2)(5a^2b+1/4ab^2)=25a^4b^2-1/16a^2b^4

1,69у^14-900z^8=(1.3y^7-30z^4)*(1.3y^7+30z^4)

(c-2)(3-c)-(5-c)(5+c)=3c-c²-6+2c-25+c²=5c-31
(x-5)-x(x+3)=x-5-x²-3x=-2x-x²-5