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Aelgn · Answer 1 · 2021-02-11T07:47:42+0000

Answer:13-25x-12x^2

Explanation:

(3-13x-7x^2)-(5x^2+12x-10)

Clearing brackets

3-13x-7x^2-5x^2-12x+10

Collect like terms

3+10-13x-12x-7x^2-5x^2

13-25x-12x^2