{1/(4+√15)}^2 =
{1/(4+√15)}^2 =
Answer/Solution
b. 31- 8√15
Steps/Work
1 / (16 - 8 root15 + 15)
= 1 / (31 + 8 root15)
Multiply numeratordenominator by (31 - 8 root15)
= (31 + 8 root15) / (961-960) = (31 - 8 root15)
Answer = B
= 1 / (31 + 8 root15)
Multiply numeratordenominator by (31 - 8 root15)
= (31 + 8 root15) / (961-960) = (31 - 8 root15)
Answer = B