Question

write down the square of 2t + 9

Answer 1

Hi,
Here is the answer to your query:-

$(2t + 9)^{2}$
$(2t)^{2}+(9)^{2}+2(2t)(9)$
$4t^{2}+81+36t$

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#BE BRAINLY

Answer 2

( 2t + 9 )²
As we know that ( a + b )² :-
a² + b² + 2ab
So,
=( 2t )² + ( 9 )² + 2 ( 2t ) ( 9 )
= 4t² + 81 + 36t
= 4t² + 36t + 81

Hope it helps you.