11. What rational algebraic expression is equivalent to ײ-1
×-1
A x + 1
B. x - 1
C. 1
D-1
12.which is the simplified form of the exprrssions ײy³ ?
×-1

A.×+1
B.×-1
C.1
D.-1
13.is the simpifried form of the rational expression a+1
a²+2a+1?

A.1
a+1

B.1/a

C.a+1

D.a

14.which is the simplified form of 15׳y⁴z²
27ײy⁵z²?
A.5
9

B.5×
9y

C.5
9y

D.5×
9
15.which is the somplified form of ײ-4
27ײy⁵z²?
A.×+2
2

B.×-2
2

C.×+2

D.×-2

18.what are the complete factors of the polynomial 7×-7?

A.7(×-1)
B.7(1-×)
C.7×-1
D.7(×-7)

19.what is the result when you square a binomial?
A.binomial
B.sum of two square
C.difference of two squares
D.perfect square trinomial

20.the square of a number equals nine times that number.find the number.

A.0 or 2
B.0 or 6
C.0 or 3
D.0 or 9
​help me pls ang hirap kasi hehe