А) <span>a(b+c)+p(b+c) = </span>(b+c) * (а+р)
б)7(x-c)+(c-x)xc = -7(c-x)+ хс(c-x)= (c-x) * (хс - 7)
в) 3(x-2)+y(2-x)^2 = 3 *(x-2)+y(2-x)(2-x) = 3* (x-2)-y(x-2)(2-x) = (x-2) * (3-у(2-x)
2)
ax+bx+ac+bc = x(a+b) + c(a+b) =(a+b) * (x+c)
<span>6x+7y+42+xy = 6*(x+7) + y(7+x) = (7+x) (6+y)
</span>2x^2 -3x+4ax-6a = x(2x-3) + 2a(2x-3) = (2x-3) * (x+2a)
1+2⁶³=9.223.372.036.854.775.809
2⁶³ = 9.223.372.036.854.775.808+1 = 9.223.372.036.854.775.809
(х+1)2=7918-2х
2х+2=7918-2х
2х+2х=7918-2
4х=7916
х=1979
<span>на одном х, на другом 2х.
2х+80=х+145
х=145-80
х=65 т на втором
65*2=130 на первом
проверим
130+80=65+145
210=210</span>