Question

25 a square minus 4 b square + 28 B C - 49 c square

Answer 1

25a²-4b²+28bc-49c
(5a)²-(2b)²+2(2b)(7c)-(7c)1
(5a-2b-7c)²
(5a-2b-7c)(5a-2b-7c)
hope it is useful for u.

Answer 2

$5 { {?}^{?} }^{?}$