Упростите: (4b+10)(10c-4b)+(2b-5c)(5c+2b) пожалуйсто !!!

Question

Упростите: (4b+10)(10c-4b)+(2b-5c)(5c+2b) пожалуйсто !!!

Answer 1

(4b+10)(10c-4b)+(2b-5c)(5c+2b)=40bc-16b^2+100c^2-40b+10bc+4b^2-25c^2-10bc=75c^2+40bc-12b^2-40b=75c^2+40bc-12b^2-40b

Comments

Обсчитался..., выше правильно (4b+10)(10c-4b)+(2b-5c)(5c+2b)=40bc-16b^2+100c-40b+10bc+4b^2-25c^2-10bc=40bc-12b^2-25c^2+100c-40b

Answer 2

40bc-12b^2+100c-40b-25c^2

Comments

Верно!