计算题:(3√5-1)^2-(4√3)^2
问题描述:
计算题:(3√5-1)^2-(4√3)^2
(1)(3√5-1)^2-(4√3)^2
化简:(a-b)/(√a-√b)
已知x=√3+√2,y=√3-√2,求x^3*y+xy^3的值
答
1.(3√5-1)^2-(4√3)^2=45-1-80-6√5=-35-6√5
2.(a-b)/(√a-√b)=(a-b)(√a+√b)/(√a-√b)(√a+√b)=(√a+√b)/a+b
3、x^3*y+xy^3=xy(x+y)(x-y)=4√6