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Algebraic Expressions — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSAlgebraic Expressions2 Marks
Question
Substituting $a=3$ and $b=2$ in $a^3-b^3$ what will be the final answer?
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Answer

Given Expression is: $a^3-b^3$
Substitute $a=3, b=2$, we get
$a^3-b^3=3^3-2^3$
$=3 \times 3 \times 3-2 \times 2 \times 2$
$=9 \times 3-4 \times 2$
$=27-8$
$=19$

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