Question

if a + b is equals to 7 and a b is equals to 10 find a minus b​

Answer 1

Hey mate!


Here is yr answer...


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Given,

a + b = 7

ab = 10

a - b = ?

(a+b)² = (a-b)² + 4ab

7² = (a-b)² + 4(10)

49 = (a-b)² + 40

49-40 = (a-b)²

9 = (a-b)²

(a-b)² = 9

a-b = √9

a-b = 3


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Hope it helps...

Answer 2

•Question:-

If a + b is equals to 7 and a b is equals to 10 find a minus b.

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•Solution:-

a+b=7(Given)

ab=10

a-b=?

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As (a+b)²-(a-b)²=4ab

=>(7)²-(a-b)²=4×10

=>49-(a-b)²=40

=>49-40=(a-b)²

=>9=(a-b)²

=>√9=a-b

=>3=a-b

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Thus, a - b = 3.

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