Question 552407
(-7x^2+5x-9)-(2x^2+7x+5)


-7x^2+5x-9-2x^2-7x-5


(-7x^2-2x^2)+(5x-7x)+(-9-5)


-9x^2-2x-14



So (-7x^2+5x-9)-(2x^2+7x+5) = -9x^2-2x-14 for all values of x.



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