Question
Find the value of using the diagonal method: $(86)^2$

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Column $I$
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Column $II$
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$(1)$
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$(21 x+13 y)^2$ |
$(a)$
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$441 x^2-169 y^2$ |
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$(2)$
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$(21 x-13 y)^2$ |
$(b)$
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$441 x^2+169 y^2+546 x y$ |
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$(3)$
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$(21 x-13 y)(21 x+13 y)$ |
$(c)$
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$441 x^2+169 y^2-546 x y$ |
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$(d)$
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$441 x^2-169 y^2+546 x y$ |