Can someone help plz

1200 sq in.

Step-by-step explanation:

DEF is 3 times bigger than ABC. We can tell by seeing on how side DE is similar to AB, and that DE is three times longer than BA.

We can apply this to the area of the triangles as well.

40x3=1200

Thus, the answer is 1200 sq in.

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct