plz as fast as posible

which of the algebraic expressions are linear expressions? select two answers.

a.

−9y

b.

−7x2+4x

c.

−12x2

d.

8xy

e.

−45x+38

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.