化简 4.5(3^2)-4.5n+3

解答

化简

4.5 (3^{2}) - 4.5 n + 3

- 4.5 n + 43.5

求解步骤

4.5 (3^{2}) - 4.5 n + 3

4.5 (3^{2}) = 40.5

= 40.5 - 4.5 n + 3

对同类项分组

= - 4.5 n + 40.5 + 3

数字相加:

40.5 + 3 = 43.5

= - 4.5 n + 43.5

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