Advertisements
Advertisements
Question
If x = –1 is a root of the equation ax2 – bx + 3 = 0, then:
Options
– a + b – 3 = 0
a – b – 3 = 0
– a – b + 3 = 0
a + b + 3 = 0
MCQ
Advertisements
Solution
a + b + 3 = 0
Explanation:
If x = –1 is a root,
Substitute into the equation:
a(–1)2 – b(–1) + 3 = 0
⇒ a + b + 3 = 0
shaalaa.com
Is there an error in this question or solution?
