Simplify: (0.8m + 1.1n) (0.8m - 1.1n)

0.64 m^{2} + 1.12 n^{2}

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0.64 m^{2} + 1.21 n^{2}

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0.64 m^{2} - 1.21 n^{2}

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0.64 m^{2} - 11.2 n^{2}

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Solution

The correct option is C $0.64 m^{2} - 1.21 n^{2}$
$(0.8 m + 1.1 n) (0.8 m - 1.1 n)$
$= (0.8 m)^{2} - (1.1 n)^{2}$
$= 0.64 m^{2} - 1.21 n^{2}$
[Using identity $a^{2} - b^{2} = (a + b) (a - b)$ ]

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Factorize:

$0.64 m^{2} - 1.21 n^{2}$

0.8 M

0.1

(N a_{2} C O_{3})

(N a^{+})

(C O_{3}^{2 -})

N a_{2} C O_{3}

g m o l^{- 1}

17 c m

0.8 m

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