5(x^2-2x)-(4-5x)+7
5(x^2 - 2x) - (4 - 5x) + 7
= 5x^2 - 10x - 4 + 5x + 7
= 5x^2 - 10x + 5x - 4 + 7
= 5x^2 - 5x + 3
Quadratic polynomial Because the higher degree is 2. Means higher power of variable is 2.
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