Question

if a+2b=3 and ab=-5 find a^2 +2b=3​

Answer 1

Answer :-

a + 2b = 3

ab = -5

Now,

( a + 2b )² = a² + 4b² + 2 (a × 2b)

( 3 )² = a² + 4b² + 4ab

9 = a² + 4b² - 20

a² + 4b² = 29

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Answer 2

Step-by-step explanation:

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