Question

$8c+4(1-c)^{2}$

Answer 1

(a-b)²=a²-2ab+b²

8c+4(1-c)²=8c+4(1-2c+c²)=8c+4-8c+4c²=4+4c²

Answer 2

мой ответ: 4 + 4с^2