Evaluate the following using suitable identities 1) 10.5^2 - 9.5^2
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20
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{(105) ²-(95) ²}/100
{(95+10) ²-(95) ²}/100
{(95) ²+(10) ²+(1900) -(95) ²}/100
cancelled (95) ²
(2000) /100
20
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