Question

One root of the quadratic equation:-
q² - mq - 5 = 0 is 2.
Find the value of m.​

Answer 1

Step-by-step explanation:

For equal roots D=b 2 −4ac=0

⇒[2(m+1)] 2 −4m(3m+1)=0

⇒m 2 +2m+1−3m 2−m=0

⇒−2m 2+m+1=0

⇒2m 2 −m−1=0⇒(m−1)(m+ 21 )=0

⇒m=1, 2−1