pa help po with solution

1. Which of the following algebraic expression could not be considered as rational algebraic expression?
A. √50×
B.5x³/²
C.4y²-9z²
D.a-b over b+a

2. what is the rational algebraic
expression equivalent (8kp³)⁰ over 4k²p³?
A.4k²p³
B.2k²p³
C.k²p³ over 4
D.k⁵p⁶ over 4

3. What is the value of the expression x³yc⁸ over x²y²c⁷ when × is 2, y is 3 and c is -2?
A.-27 over 16
B.27 over 16
C.32 over 27
D.-32 over 27

4. The area of the rectangle is x² -3x -10. What is the length of the rectangle if the width is x + 2?,
A.(x +5)(x-2)
B.(x+5)(x-2) over x-2
C.x+5 over x-2
D.x-5 ​