7. What are the roots of the equation 2-9 = 0? b.-9 a. 19 C. +3 d. 3
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7. What are the roots of the equation 2-9 = 0? b.-9 a. 19 C. +3 d. 3
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Answer:
x²-9=0
x²=9
√x²=√9
x= +3 or -3