Question

Q. If a+b=9
and ab=-22
Find a-b and a²-b²​

Answer 1

Answer:

a+b=9

a=b-9____(i)

(a-b) {put (i)}

b-9-b

-2b-9=>b=11

ab=(-22)

b=a-(-22)____(ii)

(a²-b²) {put (ii)}

a²-a-(-22)

-2a-(-22)

-2a+22=>a= -2

a=-2,b=11

so,

a-b=>-2-11=13

(a²-b²)=>(-2²-11²)

-4-121=125

Hope it helps you..