1.А)9a^2+24a+16
Б)4x^2-4xb+b^2
В)b^2-9
Г)25y^2-4x^2
2.c^2-b^2-5c^2+b^2=-4c^2
3.а)(5y-a)(5y+a)
б)(c+2b)^2
4.12-16+8x-x^2=3x-x^2
8x-3x=-12+16
5x=4
x=4/5
5.А)9x^2-y^4
Б)a^6-12a^4+36a^2
В)a^4-2a^2b^2+x^4
6.А)16x^2-9-16x^2+8x-1=3x
5x=10
x=2
Б)(4с-7)(4с+7)=0
4c-7=0 4c+7=0
c=7/4 c=-7/4
7.А)(10a^2-1/3b)(10a^2+1/3b)
Б)9x^2-x^2+2x-1=8x^2+2x-1
Д=4+33=36
x1=-1/4
x2=1/2