Find the surface area of the pyramid

2100

Step-by-step explanation:

Surface area is the area of all the sides

The area of the rectangular base is W x L =  30 x 30 = 900

Then to find the area of the triangles its bh

A = 30 x 20

A = 600

A = 300

Since there are 4 triangle faces on a pyramid we times 300 x 4 = 1200 is the area of all the triangles

Then we add the area's

1200 + 900 = 2100

Sorry if its wrong

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!