Question

if (a+b)=4 and a square + b square = 7 , then the value of ab is ​

Answer 1

$\huge{\mathfrak{\blue{\underline{Answer}}}}$

$(a + b) {}^{2} = a {}^{2} + b {}^{2} + 2ab \\ (4) {}^{2} = 7 + 2(ab) \\ 16 = 7 + 2(ab) \\ 16 - 7 = 2(ab) \\ 9 = 2(ab)$

$\huge{\mathfrak{\implies{\orange{\underline{ab=9/2}}}}}$

Answer 2

Answer:

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