Question

Tìm x

x^2 - 10x - 11 = 0

Answer 1

X²-10x-11=0

<->x²+x-11x-11=0

<->x(x+1)-11(x+1)=0

<-> (x-11)(x+1)=0

<-> x-11=0

    Hoặc x+1=0

X=-1

X=11

Answer 2

(x-5)^2-36=0

(x-5)^2=36

x-5=6

x-5=-6

x=11 hoặc -1

Answer 3

x²-10x-11=0

x²-10x=11

x.(x-10)=11

x, x-10 \(\inƯ\left(11\right)\)