Question

If a^2 +4b^2=17 and ab = 2,find a+2b.
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Answer 1

$(a+2b)^2=a^2+4ab+4b^2\\\\(a+2b)^2=17+4\cdot2\\(a+2b)^2=25\\a+2b=5 \vee a+2b=-5$

Answer 2

Answer:

answer =

$9 \div \sqrt{2}$

Step-by-step explanation:

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