Question

solve (3+2√5)² . using identity​

Answer 1

${\bf{Answer:-}}$

$(3 + 2 \sqrt{5} ) {}^{2}$

${\bf{Using \: Identity :-}}$

${\bf{ (a+b) {}^{2} =a {}^{2} +b {}^{2} +2ab}}$

${\bf{Where :-}}$

${ \red {a=3} \: and \: \red{b=2 \sqrt{5}} }$

${\implies}( {3})^{2} + (2\sqrt{5} ) {}^{2} + 2 \times (3) \times (2 \sqrt{5} ) \\{\implies} 9 + 20 + 12 \sqrt{5} \\ {\implies}29 + 12 \sqrt{5}$

Final Answer:-

${\boxed{\bf{29 + 12 \sqrt{5}}}}$

Answer 2

Answer:

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