Answer:
the answer is B
Step-by-step explanation:
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There are no real roots for a negative number, so -81 has no real roots, if the number is 81 however, then the tow roots are 9
Answer: k=ab
Step-by-step explanation:
a=
ab=k
Area is square units, so the new area would be the scale factor squared:
Scale factor is 2, so the area would increase by 2^2 = 4
The answer is B.4