Question

Разложите на множители d3-27, 25y2-9x2, 49a3-ad2 срочно

Answer 1

$d^3-27=(d-3)(d^2+3d+9)\\\25y^2-9x^2=(5y-3x)(5y+3x)\\\49a^3-ad^2=acdot (49a^2-d^2)=acdot (7a-d)(7a+d)$