Question

find the value of ab when a2+b2=25 and a+b=7​

Answer 1

Answer:

(a+b)²= a²+b²+2ab

49=25+2ab

2ab=24

ab=12

Step-by-step explanation:

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Answer 2

GIVEN :-

${a}^{2} + {b}^{2} = 25$

$a + b = 7$

$ab = ?$

⭐️ SOLUTION :-

Taking equation___a + b = 7

on squaring both the sides...

$(a + b) ^{2} = {7}^{2}$

${a}^{2} + {b}^{2} + 2ab = 49$

$25 + 2ab = 49$

$2ab = 49 - 25$

$ab = \frac{24}{2}$

$ab = 12$

Answer...

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