Question

please solve 9,10,11,12,and 13​

Answer 1

Answer:

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Step-by-step explanation:

9.sol: x^2=(x+1)^2

x^2=x^2+1^2+2x

x^2-x^2=1+2x

0=1+2x

so,this is not a quadratic equation.because it is not in the form of ax^2+bx+c

10.sol:send pic clearly

11.sol:x^2+2root2x-6=0

-2+- root of 2^2-4×2×-6/4

-2+- root of4+48/4

-2+- root of 52/4