Question

✋ Hey Guys ✋

☀......Gud mrng......☀

✈Help this lil gurl out..XD

✨Evaluate✨

✴71²
✴297×303
✴5.2²
✴1.05×9.5

Answer 1

Hello friend !.

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1) 71²

It can be written as ;

( 70 + 1 )²

Identity : (a + b)² = a² + 2ab + b²

⇒ 70² + 2 * 70 * 1 + 1²

⇒ 4900 + 140 + 1

⇒ 5041

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2) 297 × 303

It can be written as ;

( 300 - 3 ) ( 300 + 3 )

Identity : (a - b) (a + b) = a² - b²

⇒ (300)² - (3)²

⇒ 90000 - 9

⇒ 89991

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3) 5.2²

It can be written as ;

( 5 + 0.2 )²

Identity : (a + b)² = a² + 2ab + b²

⇒ (5)² + 2 * 5 * 0.2 + (0.2)²

⇒ 25 + 2 + 0.04

⇒ 27.04

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4) 10. 5 × 9.5

It can be written as ;

( 10 + 0.5 ) ( 10 - 0.5 )

Identity : (a - b) (a + b) = a² - b²

⇒ (10)² - (0.5)²

⇒ 100 - 0.25

⇒ 99.75

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Thanks for the question !

☺️☺️

@AarohiG ❤️

Answer 2

Answer:

71^2 = 5,041

297x303 = 89,991

5.2^2 = 27.04

1.05x9.5 = 9.975