Ответ:

задание №1

1.(а^2-3)(а^2+3)=а^4-9

2.(5+b^2)(b^2-5)=b^4-25

3.(3x-2y^2)(3x+2y^2)=9x^2-4y^4

4.(10p^3-7k)(10p^3+7k)=100p^6-49k^2

5.(4x^2-8y^3)(4x^2+8y^3)=16x^4-64y^6

6.(11a^3+5b^2)(5b^2-11a^3)=25b^4-121a^6

7.(7-xy)(7+xy)=49-x^2y^2

8.(8a^3b-1/3ab^2)(8a^3+1/3ab^2)=64a^6b^2-1/9a^2b^4

9.(0,3m^5+0,1n^3)(0,3m^5-0,1n^3)0,09m^10-0,01n^6

10.(7/9a^2c-1,4b^4)(1,4b^4+4/9a^2c)=49/81a^4-1,96b^8

задание №2

1.а^2+(3а-b)^2=a^2+9a^2-6ab+b^2=10a^2-6ab+b^2

2.(4x+5)^2-40x=16x^2+49x+25-40x=16x^2+9x+25

3.50a^2-(7a-1)^2=50a^2-49a^2+14a-1=a^2+14a-1

4.c^2+36-(c-6)^2=c^2+36-c^2+12c-36=12c

5.(x-2)^2+x(x+10)=x^2-4x+4+x^2+10x=2x^2+6x+4

6.3m(m-4)-(m+2)^2=3m^2-12m-m^2-4m-4=m^2-16m-4

7.(y-9)^2+(4-y)(y+6)=y^2-18y+81+4y+24-y^2-6y= -20y+105

8.(x-4)(x+4)-(x-1)^2=x^2-16-x^2+2x-1=2x-17

9.(2a-3b)^2+(3a+2b)^2=4a^2-12ab+9b^2+9a^2+12ab+4b^2=13a^2+13a^2

10.(x-5)^2-(x-7)(x+7)=x^2-10x+25-x^2+59=84-10x