Question

7m-8=15/2
solve equation​

Answer 1

Group all the coefficients together

x2−(a+b)x+ab=0

Use the quadratic formula

x=a+b±(a+b)2−4ab√2

Now note that

(a+b)2−4ab=a2+b2+2ab−4ab=a2+b2−2ab=(a−b)2

and therefore

x=a+b±(a−b)2√2=a+b±(a−b)2

Explicitly we get

x+=a+b+(a−b)2=a

x−=a+b−(a−b)2=b

Answer 2

Answer:

31/14

Step-by-step explanation:

7m - 8 = 15/2

⇒7m = 15/2 + 8

   7m = 15 + 16 / 2

   7m = 31 / 2

    m = 31 /14