Question

1) 6x(6x-4)+9x(3-4x) если x= -1/9
2) 2m(m-n)-n(3m-n)-n(n+6) если m= -4 n=0,5

Answer 1

6*1/9(6*1/9-4)+9*1/9(3-4*1/9) =  6/9*(-30/9)+1(23/9)= 99/81=11/9

Answer 2

1.36x2-24x+27x-36x2=3x x=-1/9 3*(-1/9)=-1/3 2.2m2-2mn-3mn+n2-n2-6n=2m2-2mn-3mn-6n=2m2-5n-6n=2m2-11n m=-4 n=0,5 2*(-4)2-11*0,5=2*16-5,5=32-5,5=26,5