Trik Menentukan Nilai r | Math Olympiad

Trik Menentukan Nilai r
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[@sukritshankar03]

[ You don't cancel r ] Take r common, and then equate to 0. Thus, r can be zero, or r^2 = 64 / 4 => r^2 = 16 => r = +-4

[@GeniusMathematic]

Excellent

[@andryvokubadra2644]

4r³ - 64r = 0
4r³ = 64r
4r² = 64
(±2r)² = (±8)²
±2r = ±8
±r = ±4 -->

[@GeniusMathematic]

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