Without solving explain why the equations do not have solutions

We have 2 terms:

and

For the sum of these to equal a negative number, in this case -3, one of these terms would have to be negative.

The function (square root of x) only returns positive values!

(See the attached image for a graph of )

Since neither of the terms can be negative, it can't be equal to -3. In other words, no matter what we put as , we can't solve the solution, so we say that the equation does not have any solutions.

56

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!