Solve for x in the equation (x + 7) (x minus 9) = 25

The sixth grade art students are making a mosaic using tiles in the shape of right triangles. each tile has leg measures of 3 centimeters and 5 centimeters. i f there are 200 tiles in the mosaic what is the area of the mosaic.

With this one. will mark brainliest

What is the 12th term of b(n)=-4-2(n-1)