Answer:
C.) 3 and -3
Step-by-step explanation:
The question is asking: "Which numbers can be multiplied by themselves and equal 9?" You can formally find this answer by taking the square root of 9, the opposite of squaring a number. Or, in this case, you can try the guess-and-check method. Remember, multiplying two negative numbers together results in a positive answer.
A.) is incorrect because 81 x 81 = 6561 and -81 x -81 = 6561.
B.) I'm assuming this answer is [tex]\sqrt{3}[/tex] (if it's not, there is still a better answer). This answer is incorrect because [tex]\sqrt{3}[/tex] x [tex]\sqrt{3}[/tex] = 3.
C.) is correct because 3 x 3 = 9 and -3 x -3 = 9.
D.) is incorrect because -3² also equals 9.
