(6-a)(6+a)+a^2-6a при а=-0.5

Question

(6-a)(6+a)+a^2-6a при а=-0.5

Answer 1

(6-(-0.5))(6+(-0.5))+(-0.5^2)-(-0.5*6)
(6+0.5)(6-0.5)+0.5^2+6*0.5
6.5*5.5+0.25+3=39