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Linear Equations in One Variable — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSLinear Equations in One Variable1 Mark
Question
(3x + 5y)(3x - 5y) = (9x2 - 25y2).
✓

Answer

True.
Solution:
LHS = (3x + 5y)(3x - 5y)
= 3x (3x - 5y) + 5y (3x - 5y)
= 9x2 - 15xy + 15xy - 25y2
= 9x2 - 25y2
L.H.S = R.H.S.

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