Expend these following (3a-7b-c) ^2
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= 9a²+14b²+c²-42ab-14bc-6ca
Step-by-step explanation:
(3a-7b-c)²
= (3a)²+(7b)²+(c)²-2.3a.7b - 2.7b.c - 2.c.3a
= 9a²+14b²+c²-42ab-14bc-6ca
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maine tmhare kaun se question ka answer diya jo tm itne baar thanks bol rhe ho
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