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Operations on Algebraic Expressions — Maths STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8MathsOperations on Algebraic Expressions1 Mark
Question
Find following products:
$(7 x+11 y)(7 x-11 y)$
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Answer

$(7 x+11 y)(7 x-11 y)=(7 x)^2-(11 y)^2 \\
=49 x^2-121 y^2$

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