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3 years ago

If a^2 -b^2 =12 and a-b=4 what is the bay of a +b

Mathematics

1 answer:

slava [35]3 years ago

7 0

Answer:

a+b = 3

Step-by-step explanation:

a = b+4

a^2 = (b+4)(b+4) = b^2 + 8b +16=-b^2 = 12

8b=-4

b = - 1/2

a = 3.5

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