Question 3 please help me For final exam

Mathematics

2 answers:

AveGali [126]3 years ago

7 0

-13+7k-4=23+16k-2
-13-4=23+9k-2
15=23+9k
-8=9k
-8/9=k

Anuta_ua [19.1K]3 years ago

3 0

-38/9
Have you switch sides for both numbers in each side then divide the numbers you get.
-38 divided by 9 as a fraction equals -38/

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Vladimir [108]

Answer:

a = 3/2
b = -1/2

Step-by-step explanation:

$\dfrac{\sqrt{5}-1}{\sqrt{5}+1}=\dfrac{(\sqrt{5}-1)(\sqrt{5}-1)}{(\sqrt{5}+1)(\sqrt{5}-1)}\\\\=\dfrac{5-2\sqrt{5}+1}{5-1}=\dfrac{6-2\sqrt{5}}{4}\\\\=\dfrac{3}{2}-\dfrac{1}{2}\sqrt{5}$

Comparing this to the form a+b√5, we see that ...

a = 3/2

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