Answer:
79
Explanation:
When a = 4, b = 5,
24 ÷ 2a + 4b² - 6a = 24 ÷ 2(4) + 4(5)² - 6(4)
= 24 ÷ 8 + 4(25) - 24
= 3 + 100 - 24
= 79
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