Question

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

Answer 1

Answer:

i hope you understand my solution by above post

and I hope it helps you

Answer 2

Answer:

Step-by-step explanation:

(a-b)^2=(a+b)^2 -4ab=4^2 -4×-12=16+48=64

a^2-b^2=(a+b)^2 -2ab=4^2 -2×-12=16+24=40