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GaryK [48]
3 years ago
8

Whats an example of a quadratic equation that cannot be factored with a real solution?

Mathematics
1 answer:
Makovka662 [10]3 years ago
4 0

Answer:

Step-by-step explanation:

The key here is the "discriminant."  That's b^2 - 4ac, where a, b and c are the coefficients of the quadratic.

If the discriminant turns out to be positive, we have two real, different roots.

If the discriminant turns out to be zero, we have two real, equal roots.

Finally, if the discriminant turns out to be negative, we have two complex, different roots.  

Just supposing that a = 1 and b = 2, the discriminant would be

2^2 - 4(1)c.  Set this equal to 0 and solve for c:  4 - 4c = 0, or c = 1.  If c is greater than 1, the discriminant will be negative and we will have two comlex, different roots.

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PLEASE HELP I HAVE 10 MINUTES LEFT
Lena [83]

Answer:

Manufacturers has to produce 63 DVD/Blu-Ray players to achieve a minimum cost of $644

Step-by-step explanation:

The cost equation is given as:

C=0.04x^2-5x+800

This is a quadratic equation in general form, which is:

y=ax^2+bx+c

Matching, we can say:

a = 0.04

b = -5

c = 800

The minimum occurs at  x=-\frac{b}{2a}

and the minimum value would be to place that "x" value into the equation.

First, we find the minimum using values of a and b:

x=-\frac{b}{2a}=-\frac{-5}{2(0.04)}=\frac{5}{0.08}=62.5

Plugging this into original, we get:

C=0.04x^2-5x+800\\C=0.04(62.5)^2-5(62.5)+800\\C=643.75

Rounding off to nearest whole number, we can say:

Manufacturers has to produce 63 DVD/Blu-Ray players to achieve a minimum cost of $644

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3 years ago
I need help on Section 5- Topic 10 Algebra Nation, Algebra 1 Practice book. If anyone could give me answers to the questions, I
Pavlova-9 [17]

Step-by-step explanation:

Just post a pic of the page

5 0
3 years ago
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nexus9112 [7]

Answer:

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Step-by-step explanation:

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At an electronics store, a smart phone is on sale for 35% off the original price of $679. If you use the store credit card, you
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Answer:

The  final price of the smart phone if you use the store credit card is $339.5

Step-by-step explanation:

Given;

original price of the smart phone = $679

initial discount = 35%

additional discount if you use the store credit card = 15%

total discount of the smart phone if you use the store credit card

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The final price of the smart phone, if you use the store credit card is given as;

P = 0.5 X $679

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Therefore, the  final price of the smart phone if you use the store credit card is $339.5

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Answer:

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Step-by-step explanation:

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