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Algebraic Expressions and Identities — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSAlgebraic Expressions and Identities2 Marks
Question
Evaluate the following: $35 \times 37$
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Answer

Here, we will use the identity $(x + a)(x + b) = x^2+ (a + b)x + ab.$
$35 × 37$
$= (30 + 5) (30 + 7)$
$= 30^2+ (5 + 7) 30 + 5 × 7$
$= 900 + 360 + 35$
$= 1295$

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