C-03-Q032mediumsingle_mcq25a2−16b2=?25a^2 - 16b^2 = ?25a2−16b2=?a(5a+4b)(5a−4b)(5a+4b)(5a-4b)(5a+4b)(5a−4b)b(5a−4b)2(5a-4b)^2