Решение примера: 0.000828
<span>(1-4^1\3)(1+4^1\3+4^2\3)=1^3-(4^1/3)^3=1-4=-3</span>
1) (3b - 5)^2 - 7^2 = (3b - 5 - 7)(3b - 5 + 7) = (3b - 12)(3b + 2) = 3(b - 4)(3b+2)
2) (a + b - c - a + b - c)(a + b - c + a - b + c) = (2b - 2c)2a = 2(b - c)2a =
= 4a(b - c)
(3х-8)²+(4х-8)*(4х+8)+100х=
=9х²-48х+64+16х²+32х-32х-64+100х=
=25х²+52х=
=х*(25х+52)