Question

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Answer 1

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The correct answer is (+3) or (-3).

Step-by-step explanation:

As per the question,

Given,

(a + b) = 7

ab = 10

As,

1 + 6 = 7

2 + 5 = 7

3 + 4 = 7

As we know that,

a + b = 7

and, ab = 10

So, according to our thinking,

=> 5 + 2 = 7

or, 2 + 5 = 7

and, 5 × 2 = 10

or, 2 × 5 = 10

So, we find,

If a = 5

then, b = 2

So,

a - b

=> 5 - 2

=> 3

If a = 2

then, b = 5

So,

a - b

=> 2 - 5

=> (-3)

Therefore, the correct answer is (+3) or (-3).

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