(х-3)(3+х)+(х-3)²упростите

Question

(х-3)(3+х)+(х-3)²упростите

Answer 1

 (x^2 - 9) + (x^2 - 6x + 9) = x^2 - 9 +x^2 - 6x + 9 = 2x^2 -6x