Question

4(a-1)² + (a-2)(6-a) -13 =

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Answer 1

$4 {(a - 1)}^{2} + (a - 2)(6 - a) - 13 = 4 {a}^{2} - 8a + 4 + 6a - 12 - {a}^{2} + 2a - 13 = 3 {a}^{2} - 21$

Answer 2

4(a² -2a +1)+6a -a² - 12 +2a = 4a² - 8a +4 + 66a - a² - 12 + 2a = 3a² + a - 8 = 3a² -8