Question

If a + b = 4 and ab = -12, find (i) a – b (ii) a² – b²​

Answer 1

0

Step-by-step explanation:

a+b=4

then

a= 2and b=2 so

if a- b 2-2=4

Answer 2

a+b=4

Squaring both sides

(a+b) ²=4²

a²+b²+2ab=16

a²+b²+2(-12) =16

a²+b²-24=16

a²+b²=40

(a-b)²=a²+b²-2ab

40-2(-12)

40+24

=64

Therefore, a+b=√64=8

a²-b²=(a+b) (a-b)

4×8

32

Hope this helped! Mark me as brainliest please!