Find the value of 27x3 + 8y3, if
1) 3x+2y=14 and xy=8
2) 3x+2y=20 and xy= 14/9
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1) 3x+2y=14 & xy=8
now expend (3x+2y)³=14³⇒27x³+8y³+3(3x)(2y){3x+2y}=2744⇒27x³+8y³+18xy{14}=2744⇒27x³+8y³+18(8)(14)=2744⇒27x³+8y³=2744-2016=628
now expend (3x+2y)³=14³⇒27x³+8y³+3(3x)(2y){3x+2y}=2744⇒27x³+8y³+18xy{14}=2744⇒27x³+8y³+18(8)(14)=2744⇒27x³+8y³=2744-2016=628
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