Answer:
a=4,b=20
Step-by-step explanation:
7+3√5/3+√5×3-√5/3-√5+7-3√5/3-√5×3+√5/3+√5=a+b√5b=a+b√5b
3(7+3√5)-√5(7+3√5)/(3)^2+(5)^2+3(7-3√5)+√5(7-3√5)/(3)^2-(√5)^2=a+b√5b
21+9√5-7√5-3√25/9-5+21-9√5+7√5-3√25/9-5
21+2√25-3×5/4+19√25-3×5/4
21+2×5-15/4 +19×5-3×5/4
21+10-15/4+95-15/4
31-15/4 +80/4
4+20
4+20√5b
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Answers & Comments
Answer:
a=4,b=20
Step-by-step explanation:
7+3√5/3+√5×3-√5/3-√5+7-3√5/3-√5×3+√5/3+√5=a+b√5b=a+b√5b
3(7+3√5)-√5(7+3√5)/(3)^2+(5)^2+3(7-3√5)+√5(7-3√5)/(3)^2-(√5)^2=a+b√5b
21+9√5-7√5-3√25/9-5+21-9√5+7√5-3√25/9-5
21+2√25-3×5/4+19√25-3×5/4
21+2×5-15/4 +19×5-3×5/4
21+10-15/4+95-15/4
31-15/4 +80/4
4+20
a=4,b=20
4+20√5b
Answer: