Question

If a-b=7 f ab=18;find a+b

Answer 1

Answer:

11 is the answer for your question

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Answer 2

We need to know that

(a+b)² - (a-b)² = 4ab

Substituting values in above formula

(a+b)² - (7)² = 4×18

(a+b)² - 49 = 72

(a+b)² = 121

a+b = ±11