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Algebraic Expressions, Identities and Factorisation — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSAlgebraic Expressions, Identities and Factorisation2 Marks
Question
Using suitable identities, evaluate the following. $(35.4)^2- (14.6)^2$
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Answer

$(35.4)^2- (14.6)^2$
$= (35.4 + 14.6)(35.4 - 14.6)$
$= 50 \times 20.8$
$= 1040$

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