Please help
Factorise completely 36ab - 18b+6a-3

Ahomeowner plans to hang wallpaper on one wall of a bedroom that is 10 feet long if a stripe of wallpaper is 20 inches wide and stripes or hung vertically how many stripes on wall paper with the homeowner required

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Select the lengths in centimeters that would form a right triangle