PLEASE HELP THIS IS URGENT... WILL MAKE BRAINLEST GIVING LOTS IF POINTS I forgot how to factor and my quiz is today :(

like how do u get from

8x^2+18x-5=0

to

(4x-1)(2x+5)

THANK U IF U HELP!

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

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