f(x) =x2-5x+6 , f(x)=0 হলে, x = কত?
Solution
Correct Answer: Option B
দেওয়া আছে
f(x) = x2 - 5x + 6
এবং f(x) = 0
এখানে
x2 - 5x + 6 = 0
⇒ x2 - 2x - 3x + 6 = 0
⇒ x(x - 2) - 3(x - 2) = 0
⇒ (x - 2)(x - 3) = 0
হয়, x - 2 = 0
⇒ x = 2
অথবা, x - 3 = 0
⇒ x = 3
f(x) = x2 - 5x + 6
এবং f(x) = 0
এখানে
x2 - 5x + 6 = 0
⇒ x2 - 2x - 3x + 6 = 0
⇒ x(x - 2) - 3(x - 2) = 0
⇒ (x - 2)(x - 3) = 0
হয়, x - 2 = 0
⇒ x = 2
অথবা, x - 3 = 0
⇒ x = 3
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