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Hi, let's start the question number 17.
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In 17, we have two parts.
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Part a is solve 3 by 4 plus 2 by 3.
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So to solve this first we try to make the denominator same.
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So take 3 by 4 first term 3 by 4.
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If we multiply this term numerator and denominator by 3, then we get 3 is a 9 upon 4 3 is a 12 and now take 2 by 3.
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If we multiply numerator and denominator by 4, so here we get 4 2's are 8 upon 12 4 3's are 12.
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Here we get denominator are same.
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So that means we get 3 by 4 can be written as 9 by 12 and 2 by 3 can be written as 8 by 12.
00:47
Here denominators are same.
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When denominators are same, then we combine the numerator.
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So we get here 9 plus 8 upon 12.
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9 plus 8 is 17 upon 12.
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So that means here we get 3 by 4 plus 2 by 3 equal to 17 upon 12 and there is some another method by using lcm.
01:15
So if you take lcm of 3 and 4 that is also equal to 12.
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So now part b is simplify 3 by 4 minus 2 by 3.
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So similarly first we try to make the denominator same multiply that term by 3.
01:36
So we get 3 into 3 upon 4 into 3 minus multiply this term 2 by 3 by 4.
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So we get 2 into 4 upon 3 into 4.
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So we get here 3 3's are 9 upon 12 minus 8 upon 12.
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Here denominator are same.
01:56
Then we combine the numerator...