find the value of 27x³+8y³if 3x+2y=14 and xy=8
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3x+2y=14
(3x+2y)³=14³
27x³+8x³+3(3x)(2y)(3x+2y)=14³
27x³+8x³+18xy(14)=2744. (3x+2y=14 so replace 3x+2y=14)
27x³+8y³+18(8)(14)=2744. (replace xy by 8)
27x³+8y³+2016=2744
27x³+8y³=2744-2016
27x³+8y³=728....
Hope this will help you
Thankuu
(3x+2y)³=14³
27x³+8x³+3(3x)(2y)(3x+2y)=14³
27x³+8x³+18xy(14)=2744. (3x+2y=14 so replace 3x+2y=14)
27x³+8y³+18(8)(14)=2744. (replace xy by 8)
27x³+8y³+2016=2744
27x³+8y³=2744-2016
27x³+8y³=728....
Hope this will help you
Thankuu
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