1.
a)х^2-y^2=(x-y)(x+y)
б)9a^2-c^2=(3a-c)(3a+c)
в)0.01x^2-4y^2=(0.1x-2y)(0.1x+2y)
2.
a)81-25x^2=(9-5x)(9+5x)
б)a^2x^2-16=(ax-4)(ax+4)
в)x^2-y^2=(x-y)(x+y)
3.
a)552-452=8*69-8*59=8(69-59)=80
б)16.92-6.92=1/100(1692-692)=1/100*1000=10
в)61*59=(60+1)*(60-1)=3600-1=3599.
1.
a)х^2-y^2=(x-y)(x+y)
б)9a^2-c^2=(3a-c)(3a+c)
в)0.01x^2-4y^2=(0.1x-2y)(0.1x+2y)
2.
a)81-25x^2=(9-5x)(9+5x)
б)a^2x^2-16=(ax-4)(ax+4)
в)x^2-y^2=(x-y)(x+y)
3.
a)552-452=8*69-8*59=8(69-59)=80
б)16.92-6.92=1/100(1692-692)=1/100*1000=10
в)61*59=(60+1)*(60-1)=3600-1=3599.