Question

2. Разложите на множители:
а) 25х – х3 б) 2х2 – 20х + 50

Answer 1

$<var>25x - x^3=x(25-x^2)=x(5-x)(5+x)</var>$

$<var>2x^2 - 20x + 50=2(x^2-10x+25)=2(x-5)^2</var>$

Answer 2

25х – х^3 = x(25-x^2) = x(5-x)(5+x)

 

2х^2 – 20х + 50 = 2(x^2-10x+25) = 2(x-5)^2 = 2(x-5)(x-5)