Question

r^2-7r+16=0 then r=?
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Answer 1

Answer:

I don't know your question

Step-by-step explanation:

just ask from some body else

Answer 2

Step-by-step explanation:

r²-7r+16=0

r= -(-7)±√[(-7)²-4.1.16]

r=7±√(49-64)

r=7±√(-15)