-x²-10x+4=x²+16x+64
-x²-x²-10x-16x+4-64=0
-2x²-26x-60=0
x²+13x+30=0
D=169-120= 49
x1= (-13+7)/2= -3
x2= (-13-7)/2= -10
-x²-10x+4=x²+16x+64
-x²-x²-10x-16x+4-64=0
-2x²-26x-60=0
x²+13x+30=0
D=169-120= 49
x1= (-13+7)/2= -3
x2= (-13-7)/2= -10