Question

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4. If a - b = 5 and ab = 6, find a + b.​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

b = -6 b = 1.

Step-by-step explanation:

ab = 6

a = 6/b

a - b = 5

6/b - b = 5

6-b^2 / b = 5

6 - b^2 =5b

b^2 + 5b - 6 = 0

b^2 +6b - b - 6 = 0

b(b + 6) - 1(b + 6) = 0

(b + 6) (b-1) = 0

b + 6=0 OR b - 1=0

b = -6 b = 1.

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