If (x^2 2 x 1) is singular and (x 2x 3x 4x) is non-singular, find the value of x.

russboys3   ·   24.10.2020 19:30
ANSWER(S)
answered: Arealbot
26.06.2019 08:30

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45

answered: donaldpartee1
25.06.2019 19:50
500 dollars and its probably more than that
25.06.2019 08:00
I’m not absolutely sure but i think it’s 7x6x5x4x3x2=5040 because as the first character you can take any of the 7 given then you are left with 5 then 6 then 4 etc.
23.11.2020 20:24

I assume you're talking about two square matrices,

A=\begin{bmatrix}x^2&2\\x&1\end{bmatrix}

and

B=\begin{bmatrix}x&2x\\3x&4x\end{bmatrix}

If A is singular, then its determinant is 0:

\det A=x^2-2x=x(x-2)=0\implies x=0\text{ or }x=2

B is not singular, so its determinant is not 0:

\det B=4x^2-6x^2=-2x^2\neq0

This tells you x ≠ 0, so x = 2.

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