Answer:
The answer is
Step-by-step explanation:
4.3
A 3x3 matrix has a characteristic polynomial of degree 3. If all the elements of the matrix are real, then the polynomial has up to 3 distinct complex roots. If one of these roots is complex (in particular, has a non-zero imaginary part), then a second root would be that first root's complex conjugate. Then the remaining root has to be real.
The quadratic equation you provided has
so the discriminant b²-4ac is ...
... b² - 4ac = (-3)² -4(-2)(8) = 9 + 64 = 73
The discriminant is positive, so there are two real solutions to the given equation.
Answer:
just multiply and divide and you will get your answer
Step-by-step explanation:
Note:
3x means 3 times x or x+x+x
xx means x times x or x(x)
so
x+5+x+x+x+x+x+5=x+x+6+x+x
add like terms
6(x)+10=4(x)+6
not sure about the 0-9 part so I will disreagrd for now, please ask for correction later
6x+10=4x+6
subtract 4x from both sides
2x+10=6
subtract 10 from both sides
2x=-4
divide both sides by 2
x=-4/2=-2 (divide or multiply by different signs and get negative)
x=-2