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ICSE Class 10 Answered

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Asked by Kanwaranita10 | 03 Mar, 2020, 02:48: PM
answered-by-expert Expert Answer
10. (b)
 
Let the 1st natural number be x and then the second natural number will be x + 7.
 
According to the question, we get
x(x + 7) = 450
→ x2 + 7x - 450 = 0
→ x2 - 18x + 25x - 450 = 0
→ x(x - 18) + 25(x - 18) = 0
→ (x - 18)(x + 25) = 0
→ x = 18 or x = -25
-25 is not a natural number.
→ x = 18
 
Therefore, the numbers are 18 and 25.
 
 
Please ask only one query at a time.
Answered by Yasmeen Khan | 03 Mar, 2020, 04:42: PM

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