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Algebraic Expressions — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSAlgebraic Expressions2 Marks
Question
Add the following: $2 x^2 y,-4 x^2 y, 6 x^2 y,-5 x^2 y$
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Answer

Adding the given terms,
We have,
$2 x^2 y+\left(-4 x^2 y\right)+\left(6 x^2 y\right)+\left(-5 x^2 y\right)$
$=2 x^2 y-4 x^2 y+6 x^2 y-5 x^2 y$
$=(2-4+6-5) x^2 y$
$=(8-9) x^2 y$
$=-x^2 y$

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