I would say the 4th one to the right sorry if I’m wrong
She is not correct.
The GCF for 2x^2 + 4xy + 8xy^4
is 2x
The first term does not have a 'y' in it so you cannot have a 'y' in the GCF.
The second and third terms both only have 1 'x', so you can only take out 1 'x', not 2.
The highest constant that all three terms have in common is a 2.
-4(2x+5)34>4(-x+3)-2x
-8x-20+34>-4x+12-2x
-8x+14>-6x+12
+6x +6x
-2x+14>+12
-14 -14
-2x>-2
/-2 /-2
x>1
They are all perfect squares because if you took the square root of them you will get a single number. Like the square root of 25 is 5 bc 5(5) is 25
16 is 4 bc 4(4) is 16
9 is 3 bc 3(3) is 9
1 is 1 bc 1(1) is 1
& so on & so forth
