[질문] 수학공식을모두알려주세요

1.m(a+b)=ma+mb2.(a+b)²=a²+2ab+b²3.(a-b)²=a²-2ab+b²4.(a+b)(a-b)=a²-b²5.(x+a)(x+b)=x²+(a+b)x+ab6.(x-a)(x-b)=x²-(a+b)x+ab7.(ax+b)(cx+d)=acx²+(ad+bc)x+bd