(c+5)+2c (5c-3) при с=6

Question

(c+5)+2c (5c-3) при с=6

Answer 1

С+5+10с^2–6с=10с^2–5с+5=10*6^2–
–5*6+5=360–30+5=335

Answer 2

С+5 +10с²-6с = -5с+5+10с²
Если с = 6, то -5с+5+10с² = -30+5+10*36 = -25+360 = 335