Math, asked by anchalchauhan469, 5 hours ago

x+2y =9 xy=-10 then find x³+8y³


Answers

Answered by prikshitkundal0
53

Answer:

Since a3+b3=(a+b)3−3ab(a+b)a3+b3=(a+b)3−3ab(a+b), we have

x3+(2y)3=(x+2y)3−6xy(x+2y)=83−(6⋅6⋅8)=8(82–62)=224x3+(2y)3=(x+2y)3−6xy(x+2y)=83−(6⋅6⋅8)=8(82–62)=224. ■ make me branest

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