Question

rozwiń wzór

(a+b+c)²=

Answer 1

(a+b+c)²=

(a+b+c)(a+b+c)=

a²+ab+ac+ab+b²+bc+ac+bc+c²

a²+b²+c²+2ab+2ac+2bc

Answer 2

(a+b+c)²=a²+b²+c²=a*a+b*b+c*c