упростите...

Question

упростите выражение:

(p+6)(6-p)+(p+2)

(c-4)^2-(c-10)(c+10)

(x+3)(x-3)-(x+5)^2

(1-2y)^2(2y-3)(2y+3)

Answer 1

1. -p(во 2 степени) + 7p + 38
2. = 116
3. = 16
4. -17 x 32y ( во 2 степени ) 

Answer 2

(p+6)(6-p)+(p+2)=6р-р^2+36-6р+р+2=-p^2+5p+38

(c-4)^2-(c-10)(c+10)=c^2-8c+16-c^2-10c+10c+100=116-8c

(x+3)(x-3)-(x+5)^2=x^2-3x+3x-9-x^2-10x-25=-10x-25