Question

If a+b =9 and ab =-22 then the value of a-b is
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Answer 1

Step-by-step explanation:

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Answer 2

Answer:

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YOUR ANSWER =>

Given: a + b = 9

ab = -22

Find: (a-b) = ?

Sol:

(a+b)^2 = a^2 + b^2 + 2ab

9^2 = a^2 + b^2 + 2(-22)

a^2 + b^2 = 125

Now, (a-b)^2 = a^2 + b^2 - 2ab

(a-b)^2 = 125 - 2(-22)

(a-b)^2 = 169

a-b = +_13