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Evaluate: (a - 0.1) (a + 0.1)?

Asked by Manmohan 09/11/2016 Last Modified 01/12/2016

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If m and n are odd positive integers, then m2 + n2 is even, but not divisible by 4. Justify.

Since m is odd positive integer then we can write m=2a+1 and n=2b+1, such that a,b >0 m2+n2=(2a+1)^2+(2b+1)^2 = 4a^2+1+4a+4b^2+1+4b = 4a^2+4b^2+4a+4b+2 = 2(2a^2+2b^2+2a+2b+1) Above eqn is divisible by 2 but not divisible by 4.

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How can I study like class 10 in class 9 so that I get a habit?

Spend time in studying your subjects daily . Don't postpone to the next day .cover all the portions don't omit any topics or chapters . This will help you to score good marks in 10 th .

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Is coaching required for class 10 cbse?

Its fully your choice If you are able to study by your own then no need for coaching Only proper management is required

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Is polynomial y4 + 4y2 + 5 have zeroes or not?

The polynomial y4 + 4y2 + 5 has no zero(s) because the roots are not real.

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Which one is better for a student of class 9 tuition or coaching?

According to me tution will be better choice as many coachings nowadays are having a lot of students and therefore teacher cannot concentrate on all students

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