You would have to move terms which will bring you to 14.4 x - 19.2 = 19.2 - 4.8x the you would combine like terms then you would get 19.2x= 38.4 then you divide both sides by 19.2 and get 2 as your answer.
Divide the first one to 2 rectangles by drawing a line and then find the area of both rectangles, then add them.
The second one is divided in to 2 trapezoids. Find the area of both trapezoids and then add them.
The first step to solving this is to factor out the first perfect square

now factor out the second perfect square

then factor out the second perfect square

the root of a product is equal to the product of the roots of each factor

reduce the index of the radical and exponent with 2 of the first square root
12

reduce the index of the radical and exponent with 2 of the second square root
12x³

reduce the index of the radical and exponent with 2 of the third square root
12x³y²

this means that the correct answer to your question is 12x³y²

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let me know if you have any further questions
:)
=3+*sqr root*6 +19 - *sqr root* 12
=21 + *sqr root* 6 - *sqr root* 12
= 21+ *sqr root* 6 - 2 square roots of 6