(p-5)(p+5) (m-3n)(3n+m) (x-3)(x+3) (7x-2)(2+7x) (2m+n)(2m-n) (x²-2)(x²+2) (a²+1)(1-a²) (2x+3y)(3y-2x²)

(p-5)(p+5)=р²-25 (m-3n)(3n+m)=(m-3n)(m-3n)=m²-9n² (x-3)(x+3)=х³-9 (7x-2)(2+7x)=(7x-2)(7x+2)=49х²-4 (2m+n)(2m-n)=4m²-n² (x²-2)(x²+2)=х⁴-4 (a²+1)(1-a²)=(1+a²)(1-a²)=1-а⁴ (2x+3y)(3y-2x²) Без значений только так