Question

Bagaimana cara mengerjakan (a-b)^2

Answer 1

(a-b)^2
=(a-b). (a-b)
=a . (a-b) -b (a-b)
=a^2-ab-ab-b^2
=a^2-2ab-b^2

Answer 2

Pake segitiga paskal. klo pangkat 2 berarti=> 1 2 1
1xa²-2xab+1xb²=a²-2ab+b²