Show that: (4x + 7y)^2 – (4x – 7y)^2 = 112xy

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Show that:
(i) (4x + 7y)2 – (4x – 7y)2 = 112xy
(ii) \left(\frac{3}{7} p-\frac{7}{6} q\right)^{2}+p q=\frac{9}{49} p^{2}+\frac{49}{36} q^{2}
(iii) (p – q)(p + q) + (q – r)(q + r) + (r – p) (r + p) = 0

Solution:
ML Aggarwal Class 8 Solutions for ICSE Maths Chapter 10 Algebraic Expressions and Identities Ex 10.5 15
ML Aggarwal Class 8 Solutions for ICSE Maths Chapter 10 Algebraic Expressions and Identities Ex 10.5 16

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