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[Algebra II] Finding zeros of a quadratic using the quadratic formula
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daoden2000 is
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Algebra II
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Teacher gave us a math assignment and then an answer key to check our work. On one of the problems i thought i was done and i had my answer but apparently there were several more steps. I don't understand what is being done. Here's the steps. I understand everything up to the part where there is now a 1 in front of the square root (Second to last step).
Can someone tell me what is being done right there and why?
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