what should be subtracted from 18246 to get a perfect square number ? what is this perfect square number? also, find its square root.
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When was in algebra in high school our teacher had up memorize the square roots to 23x 25 I know that 13x13 = 169 so I know that 130x130 = 16900 Then I know that 14 x14 = 19600. Now I know that the answer is between 130 and 140. So multiply 131 x 131 to equal 17161. 132 x 132 =17424. 133 x133=17689, 134 x134=17856, 135 x 135=18225. That number is the closest. 18246 - 18225 =21
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