X - 4 = -1 what’s does x equal

What is the missing step in this proof ?

(x-5)1/2+5=2 what is possible solution of this equation

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no