Question

Разложите на множители:
1. a^4+4a^3-6a^2
2. 3а+20xb-3b-20xa
3. x^2-y^2-5x-5y

СРОЧНО!!!

Answer 1

а⁴+4а³-6а²=а²(а²+4а-6).
3a+20xb-3b-20xa=3a-20xa+20xb-3b=a(3-20x)-b(3-20x)=(a-b)(3-20x).
x²-y²-5x-5y=(x-y)(x+y)-5(x+y)=((x-y)-5)(x+y)=(x-y-5)(x+y).