Question

365 допоможіть будьласка

Answer 1

$1)\\\\(a-8)(a+3)-(a-7)(a+2)=\\\\a^2+3a-8a-24-(a^2+2a-7a-14)=\\\\a^2+3a-8a-24-a^2-2a+7a+14=-10\\\\2)\\\\(a^2-2)(a^2+5)-(a^2-4)(a^2+4)-3a^2=\\\\a^4+5a^2-2a^2-10-(a^4-16)-3a^2=\\\\a^4+5a^2-2a^2-10-a^4+16-3a^2=6$