rationalise the denominator 4 √12 - 7√6 by 5√6 - 2 √12
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Answer:
(4√12-7√6)/(5√6-2√12)
=(4√12-7√6)(5√6+2√12)/(5√6-2√12)(5√6+2√12)
=(20√72-35×6+8×12-14√72)/{(5√6)^2-(2√12)^2}
=(6√72-210+96)/(150-48)
=(6√(6×6×2)-114)/102
=(36√2-114)/102
=6(6√2-19)/6×17
=(6√2-19)/17
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