Mathematic Problems
9- 5x=3-x+63-x
9- 5x=3-x+63-x
9-5x=3-x2+63-x ; 9-5x095xx95
9-5x=3-x+63-x
9-5x=9-x3-x
9-5x2=9-x23-x2
9-5x=9-x23-x
9-5x3-x=9-x2
27-15x-9x+5x2=81-18x+x2
5x2-x2-15x-9x+18x+27-81=0
4x2-6x-54=0
4x2-6x-54=0·/12
2x2-3x-27=0
a=2 ; b=-3 ; c=-27
x1,2=--3±-32-4·2·-272·2=3±9+2164=3±2254=3±154
x1=3+154=184 x2=3-154=-124
x1=92=3,5>1,8
x2=-3<1,8
x=-3
x=-3