Question

а)9р2-4
б)1-25х2
в)м2-с2
г)-х2+у2

Answer 1

$1)9p^2-4=(3p-2)(3p+2)\\2)1-25x^2=(1-5x)(1+5x)\\3)m^2-c^2=(m-c)(m+c)\\4)-x^2+y^2=y^2-x^2=(y-x)(y+x)$