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nirvana33 [79]
3 years ago
5

What is the value of the discriminant for the quadratic equation -3=-x^2+2x? discriminant =b^2-4ac

Mathematics
2 answers:
Elena L [17]3 years ago
9 0

Answer:

<h2>D = 16</h2>

Step-by-step explanation:

-x^2+2x=-3\qquad\text{add 3 to both sides}\\\\-x^2+2x+3=0\\\\a=-1,\ b=2,\ c=3\\\\\text{Substitute to}\ D=b^2-4ac:\\\\D=2^2-4(-1)(3)=4+12=16

Paul [167]3 years ago
6 0

Answer:

Discriminant = 16

Step-by-step explanation:

We have the following expression: -3 = -x^2 + 2x

Organizing the expression, we have: x^2 - 2x -3 = 0

We know that for an equation of the type: ax^2 + bx + c = 0, the discriminant is: b^2-4ac

From our equation we know that a=1, b=-2, and c=-3.

Then Discriminant = (-2)^2 - 4(1)(-3)

Discriminant = 4 +12 = 16

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What is the standard form of the polynomial: 9x(squared)+ 5x+27+2x(to the power of 3
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Step-by-step explanation:

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2 years ago
Use the diagram shown to answer the questions.
romanna [79]

Answer:

13

Step-by-step explanation:

First drop the line.

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How many units is it from Point r to the y axis?

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Now we can use the Pythagorean Theorem.

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4 0
2 years ago
Read 2 more answers
Jasmyn uses 42% of a gift card to buy groceries if she spent $67.20 on groceries, how much was on the gift card to begin with
lapo4ka [179]

Answer:

The card was worth $160.

Step-by-step explanation:

It is given that:

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Cost of groceries = $67.20

Let,

x be the total amount on gift card.

42% of x = 67.20

\frac{42}{100}x=67.20

0.42x = 67.20

\frac{0.42x}{0.42}=\frac{67.20}{0.42}\\x=160

Therefore,

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4 0
3 years ago
DID YOU KNOW, in 1626, Peter Du Minuit traded beads and blanket (valued at $24) to the Native American inhabitants of Manhattan
otez555 [7]

Answer: $585.60

Step-by-step explanation:

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Using simple interest, the investment will be worth;

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= 24 * (1 + 0.06* 390)

= $585.60

6 0
2 years ago
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