7x squared -5x+2 from x squared -4x+3?
回答 (3)
2009-04-28 4:57 pm
✔ 最佳答案
x ² - 4 x + 3 - 7 x ² + 5 x - 2- 6 x ² + x + 1
2009-04-28 11:58 pm
(x^2 - 4x + 3) - (7x^2 - 5x + 2)
= x^2 - 4x + 3 - 7x^2 + 5x - 2
= x^2 - 7x^2 - 4x + 5x + 3 - 2
= -6x^2 + x - 1
= x^2 - 4x + 3 - 7x^2 + 5x - 2
= x^2 - 7x^2 - 4x + 5x + 3 - 2
= -6x^2 + x - 1
2009-04-28 11:55 pm
(x^2-4x+3)-(7x^2-5x+2)
=x^2-4x+3-7x^2+5x-2
=x^2-7x^2-4x+5x+3-2
=-6x^2+x+1
=x^2-4x+3-7x^2+5x-2
=x^2-7x^2-4x+5x+3-2
=-6x^2+x+1
收錄日期: 2021-05-01 12:19:01
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