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3 years ago

13

What is the solution set of 4x 2 - 36 = 0? A.{-3} B.{3} C.{-3, 3}

2 answers:

Dima020 [189]3 years ago

5 0

It is short work to check the answer choices.
4*3² -36 = 0 . . . . yes, so +3 is a solution
4*(-3)² -36 = 0 . . . . yes, so -3 is a solution

The appropriate choice is ...
C. {-3, 3}

Nimfa-mama [501]3 years ago

4 0

4x^2 - 36 = 0
4x^2 = 36
x^2 = 9
x = 3 or -3
the answer is C

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