Easy
1 point
ID: #26470
Question
যদি (x–5)(a+x) = x²–25 হয়, তবে a এর মান কত?
Options
1
5
Correct Answer
2
-5
Correct Answer
3
25
Correct Answer
4
-25
Correct Answer
Explanation
দেওয়া আছে, (x–5)(a+x) = x² – 25
বা, (x–5)(a+x) = (x–5)(x+5) [সূত্র: a²-b²]
উভয় পক্ষ থেকে (x-5) বাদ দিলে পাই,
a + x = x + 5
∴ a = 5.
Actions
Type
Single Choice
Created By
admin@chakribidda.com