Evaluate the discriminant of each equation. Tell how many solutions each equation has and whether the solutions are real or imag
inary.
x^2 - 4x - 5 = 0
2 answers:
Answer:Either -1 or, 5
Step-by-step explanation:
x²-4x-5=0
x²-5x+x-5=0
(x+1)(x-5)=0
Either x=-1 or, x=5
Answer: Discriminant is 36. There are two real solutions (both different)
Explanation:
The equation 1x^2 - 4x - 5 = 0 is in the form ax^2 + bx + c = 0. We see that
a = 1, b = -4, c = -5
So the discriminant is
D = b^2 - 4ac
D = (-4)^2 - 4(1)(-5)
D = 16 + 20
D = 36 is the discriminant
The discriminant is positive, so there are two different solutions. The solutions are both real.
note: because the discriminant is a perfect square, this means that the two solutions are rational (ie fractions of whole numbers).
You might be interested in
Answer: 4/16, 5/20, 6/24
Step-by-step explanation:
The fraction of 1/4 will multiply by the same number n on both numerator and denominator.
Answer:
Hence the expression
Step-by-step explanation:
Explanation
- The given expression is (4z-y)(z-6).
- We have to multiply the given expression.
- Multiply the (4 z-y) by -6, multiply the (4 z-y) by z then add like terms.
________________
______________________
Answer:
iddpd
Step-by-step explanation:
kddjdjdkdodidjdjddjdidodododkdjddjdjdjdidodldlddnnxkddo
Answer:
Domain- [-4,0] Range-[-4,4]
Step-by-step explanation:
the domain is the x values and the range is the y values