(iii) (4a? - 6ab + 9b2) (2a + 3b); a = 2, b = 1
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(4a - 6ab + 9b²) (2a + 3b)
(4(2) - 6(2)(1) + 9(1)²) (2(2) + 3(1)
(8 - 12 + 9) (4 + 3)
(17 - 12) (4 + 3)
(5)(7)
= 35
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