Isaac Solomon Wong's answer to Bryan Ng's Secondary 1 Maths Singapore question.
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To make something a perfect square, all of its factors must have an even number power, 0 included. Anything to the power of zero is 1, so anything works, less your term is zero.
In this question, they asked for the lowest value of k, so try not to change anything that doesn't need to be changed (like 5), so by dividing 1350 by 2, you change 2's power from 1 to 0, making it even. Good job. Move on. Dividing 1350 by 3 makes 3's power reduce from 3 to 2. Thus, K= 2×3.
In this question, they asked for the lowest value of k, so try not to change anything that doesn't need to be changed (like 5), so by dividing 1350 by 2, you change 2's power from 1 to 0, making it even. Good job. Move on. Dividing 1350 by 3 makes 3's power reduce from 3 to 2. Thus, K= 2×3.
Date Posted:
5 years ago
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