log10 (x2 +6x + 10) = 0 হলে, x এর মান কত?
Solution
Correct Answer: Option D
log10 (x2 +6x + 10) = 0
(x2 +6x + 10 = 1
x2 +6x + 10 = 1
x2 +6x + 10 -1 = 0
x2 +6x + 9 = 0
x2 + 2.x.3 + 32 = 0
(x + 3)2 = 0
x +3 = 0
x = -3
(x2 +6x + 10 = 1
x2 +6x + 10 = 1
x2 +6x + 10 -1 = 0
x2 +6x + 9 = 0
x2 + 2.x.3 + 32 = 0
(x + 3)2 = 0
x +3 = 0
x = -3
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions