Question

If a+b = 4 and ab= -12 find,
1)a-b 2)a2 - b2​

Answer 1

Step-by-step explanation:

a = 4 - b

ab = (4-b)b = -12

$4b - {b}^{2} = - 12$

${b}^{2} - 4b - 12 = 0$

(b - 6)(b + 2) = 0

b = 6; b = -2

If b = 6, then a = -2

If b = -2, then a = 6

a - b = -8 (or) +8

${a}^{2} - {b}^{2} = 4 - 36 = - 32$

(0r)

${ a}^{2} - {b}^{2} = 36 - 4 = 32$

Answer 2

answer is above

like and comment