Using identities, evaluate: 5.2^2...

Using identities, evaluate: `5.2^2`

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The correct Answer is:

`27.04 `

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NAND LAL PUBLICATION-ALGEBRAIC EXPRESSIONS AND IDENTITIES -EXERCISE 9.5

Show that: (4/3m-3/4n)^2 +2mn=(16)/9m^2+9/16n^2
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Show that: (4pq + 3q)^2 – (4pq – 3q)^2 = 48pq^2
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Show that: (a – b) (a + b) + (b – c) (b + c) + (c – a) (c + a) = 0
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Using identities, evaluate: 71^2
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Using identities, evaluate: 99^2
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Using identities, evaluate: 102^2
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Using identities, evaluate: 998^2
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Using identities, evaluate: 5.2^2
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Using identities, evaluate: 297xx303
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Using identities, evaluate: 78xx82
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Using identities, evaluate: 8.9^2
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Using identities, evaluate: 10.5xx9.5
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Using a^2 – b^2 = (a + b) (a – b), find: 51^2 – 49^2
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Using a^2 – b^2 = (a + b) (a – b), find: (1.02)^2 – (0.98)^2
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Using a^2 – b^2 = (a + b) (a – b), find: 153^2 – 147^2
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Using a^2 – b^2 = (a + b) (a – b), find: 12.1^2 – 7.9^2
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Using (x + a) (x + b) = x^2 + (a + b) x + ab, find: 103xx104
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Using (x + a) (x + b) = x^2 + (a + b) x + ab, find: 5.1xx5.2
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Using (x + a) (x + b) = x^2 + (a + b) x + ab, find: 103xx104
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Using (x + a) (x + b) = x^2 + (a + b) x + ab, find: 5.1xx5.2
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