Question

7) If a + b = 4 and ab = -12, find (i) a - b (i) a2 - 62.​

Answer 1

Answer:

(a-b)=8 and (a^2-b^2)=32

Step-by-step explanation:

a+b=4 and ab=-12

(a-b)^2=(a+b)^2-4ab    so as per the given values

a-b=√16+48=√64

so a-b=8

a^2-b^2 an be written as (a+b)(a-b)

which is 4*8=32

so a^2-b^2=32

I REALLY HOPE THIS HELPS YOU