Объяснение:
1) -9x²+2x+11=0
9x²-2x-11=0
9x²+9x-11x-11=0
9x(x+1)-11(x+1)=0
(x+1)(9x-11)=0
1.1) x+1=0
x=-1
1.2) 9x-11=0
x=
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Объяснение:
1) -9x²+2x+11=0
9x²-2x-11=0
9x²+9x-11x-11=0
9x(x+1)-11(x+1)=0
(x+1)(9x-11)=0
1.1) x+1=0
x=-1
1.2) 9x-11=0
x=