Question

If a+b=4 and ab= -12, find a+b and a-b

please do it fast and I mark you brainliest
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Answer 1

Step-by-step explanation:

hope this answer helps you.

Answer 2

Answer:

± 8

Step-by-step explanation:

We know that

(a - b)² = (a + b)² - 4ab

Substituting the given values

(a - b)² = 4² - 4(- 12 )

(a - b)² = 16 + 48

(a - b)² = 64

Taking square root on both sides

a - b = ± √64 = ± 8

Therefore the value of a - b is ± 8.