Rationalise the denominator of 1/((8 + 5√2))
Last updated at Oct. 1, 2020 by Teachoo
Last updated at Oct. 1, 2020 by Teachoo
Transcript
Rationalise the denominator of 1/((8 + 5√2)) We have 1/((8 + 5√2)) = 1/((8 + 5√2)) × ((8 − 5√2))/((8 − 5√2)) = ((8 − 5√2))/((8)^2 − (5√2)^2 ) = ((8 − 5√2))/(64 − 50) = ((𝟖 − 𝟓√𝟐))/𝟏𝟒
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