Which of these is equal to 4 (−)4
A.()4 B.(−)4 .−()4 D. (−)4

(a)

Step-by-step explanation:

Given

Required

Select and equivalent expression

Apply law of indices:

This gives:

x and y have the same exponent; So, they can be expressed as:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10