Which number should be multiples to obtain 165^2-123^2

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landmar04 landmar04

03-07-2018
Mathematics

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Which number should be multiples to obtain 165^2-123^2

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how do you balance __H2SO4 + __B(OH)3 --> __B2(SO4)3 + __H2O

DeanR DeanR · Answer 1 · 2018-07-03T04:31:41+02:00

DeanR DeanR

03-07-2018

The identity in question is called the difference of two squares:

[tex]a^2 - b^2 = (a+b)(a-b)[/tex]

So

[tex]165^2-123^2=(165+123)(165-123)=288\times 42[/tex]

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