1.

Show that : (i) (3x+7)2−84x=(3x−7)2 (ii) (4pq+3q)2−(4pq−3q)2=48pq2 (iii) (a−b)(a+b)+(b−c)(b+c)+(c−a)(c+a)=0 [3 MARKS]

Answer»

Show that :

(i) (3x+7)2−84x=(3x−7)2

(ii) (4pq+3q)2−(4pq−3q)2=48pq2

(iii) (a−b)(a+b)+(b−c)(b+c)+(c−a)(c+a)=0 [3 MARKS]


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