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Find the value of (2.7)³ - …

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Find the value of (2.7)³ - (1.6)³ - (1.1)³ using a suitable identity

Posted by Trishla Jain 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 4 months ago

{tex}2.7^3-1.6^3{/tex}

{tex}=(2.7-1.6)^3+3(2.7)(1.6)(2.7-1.6){/tex}

{tex}=(1.1)^3+3(2.7)(1.6)(1.1){/tex}

{tex}=(1.1)^3+14.256{/tex}

{tex}2.7^3-1.6^3-1.1^3{/tex}

{tex}=(1.1)^3+14.256-(1.1)^3{/tex}

{tex}=14.256{/tex}

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