What is2+2x45+6-7 i cant figure it out

I think it's 179. 2+2=4
4x45= 180
6-7=-1
180-1= 179

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.