Question 21584
={{{6x^2- 19x^2-19x-(-4x)+(5-9)}}}
={{{(6-19)x^2-19x+4x-4}}}
={{{-13x^2+(-19+4)x-4}}}
={{{-13x^2+(-15)x-4}}}
={{{-13x^2-15x-4}}}