Question

(a-6)(a+1)+(2-a)(3+4a) если a=1.3

Answer 1

(a-6)(a+1)+(2-a)(3+4a)
(a^2+a-6a-6)+(6+8a-3a-4a^2)
3a^2
a=1.3
3*(1.3)^2=3*1,69=5.07