Evaluate the algebraic expression.

2a2 −(b−2a); a =1.5, b=2.9
Need the answer soon plss

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?