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If a + b = 6 and ab = 4, then what is the value of $ a^3 + b^3 $ |
125 120 144 81 |
144 |
If a + b = 6 ab = 4 Then what is the value of $ a^3 + b^3 $ (a + b)3 = a3 + b3 + 3ab(a+b) (6)3 = a3 + b3 + 3(4)(6) 216 = a3 + b3 + 72 a3 + b3 = 216 - 72 = 144 |
