find the square root of 7•1289 and 1•0816
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The square of a binomial ( a + b ) is a^2 + 2 a b + b^2. 1.0816 = 1^2 + 2 ( 1 ) ( .04 ) + ( .04 )^2 = a^2 + 2 a b + b^2. The variable a = 1 and the variable b = .04 in this case.
The square root of a^2 + 2 a b + b^2 = a + b. a + b = 1.04.
Answer : The square root of 1.0816 is 1.04.
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