Question

2abc•(5abc-7ab)=?
(k+d)•(k-dk-d)=?

Answer 1

1) 10а2b2c2-17а2b2c

2) k2-dk2-kd+dk-d2k-d2

Answer 2

Ответ:

$10a {}^{2} b {}^{2} c {}^{2} - 14a {}^{2}b {}^{2} c$

$k {}^{2} - dk {}^{2} - dk + dk - d {}^{2}k - d {}^{2} =$

$k {}^{2} - dk {}^{2} - d {}^{2} k - d {}^{2}$