A teacher selects 4 students from her class of 37 to work together on a project. How many ways are there for her to select the s
1 answer:
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Answer:
x = 3 or -3
Step-by-step explanation:
So you have the equation x² - 9 = 0
Move the 9 to the other side: x² = 9
Then take the square root of both sides: = ±
x = ± = ±3
x = 3 or -3