If B = -2t +1 and A = t+9, find an expression that equals 2B+2A in standard form.

The 8th term is 512

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

I’m not gonna do that