(6m+5)^2-36m^2-59м+5 при m=321

Question

(6m+5)^2-36m^2-59м+5 при m=321

Answer 1

(6m +5)² -36m²-59m +5 = 
= ( (6m)² + 2*6m*5 +5²) -36m²-59m+5=
= 36m² +60m +25 - 36m² -59m +5=
= (36m²-36m²) +(60m -59m) + (25+5)=
= m +30
при m = 321    ⇒  321+30 = 351