Question

if x=-1 by 2 ,is a solution of the quadratic equation 7x2+2mx-3=0.find the value of m​

Answer 1

Step-by-step explanation:

P(x)=7x²+2mx+3=0

7(-1/2)+2m(-1/2)+3=0

-7/2-m-3=0

-7-m-3=0*2

-7-m-3=0

-10-m=0

-10=m

m=-10