Find the square of 11.8 using identity.
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11.8 x 11.8 = 139.24
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Given : 11.8
To Find : square of 11.8 using identity
Solution:
11.8 = 118/10
(118/10)² = 118²/10² = 118²/100
118² = (120 - 2)²
(a - b)² = a² - 2ab + b²
= 120² - 2(120)(2) + 2²
= 14400 - 480 + 4
= 13924
(11.8)² = 13924/100 = 139.24
(11.8)² = 139.24
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