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Mathematics, 15.01.2020 09:31 katie713518

Joyce is trying to solve the equation y = x2 βˆ’ 8x + 7 using the quadratic formula. she has made an error in one of the steps below. find the step where joyce went wrong.

steps are attached

can someone find where joyce went wrong? (which step)

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Joyce is trying to solve the equation y = x2 βˆ’ 8x + 7 using the quadratic formula. she has made an e...
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