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Verified answer
Bab EksponensialMatematika SMP Kelas IX
(a + b)⁴ = a⁴ + 4 . a³ . b + 6 . a² . b² + 4 . a . b³ + b⁴
= a⁴ + 4a³b + 6a²b² + 4ab³ + b⁴
= a⁴ + 4a³b + ya²b² + zab³ + b⁴
y = 6
z = 4
4y - 2z = 4 . 6 - 2 . 4
= 24 - 8
= 16