(7+d)(d-7)+(d+3)(3-d)+40(d+1)при d=0.5

Question

(7+d)(d-7)+(d+3)(3-d)+40(d+1)при d=0.5

Answer 1

D=0.5
(7+0.5)(0.5-7)+(0.5+3)(3-0.5)+40(0.5+1)=7,5 x (-6,5)+3,5 x 2,5+40 x 1,5= (-48,75) + 8,75 + 60= 20