Mathematics, 20.12.2019 00:31 Penelope9687

Determine the number of real solutions -4x^2+20x-25=0'

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To find out the number of real solutions, we use something called "the discriminant". This is usually given the symbol "Δ", pronounced "delta"

Δ = b^2 - 4ac, where a is the x^2 coefficient, b is the x coefficient and c is the integer

When Δ = 0, there is one real solution, when Δ < 0, there are no real solutions, and when Δ > 0, there are 2 real solutions

So, substituting the values in, we get:

Δ = (20)^2 - 4(-4)(-25) = 0

Therefore, there is one real solution to the polynomial given.

Don't hesitate to ask further questions!
Hope I helped!! xx

Answer from: lina2662

Factor out the -1
-1(4x²-20x+25)=0
use ac method

4 times 25=100
what 2 factors of 100 add to -20?
-10 and -10

-1(4x²-10x-10x+25)=0
group
-1((4x²-10x)+(-10x+25))=0
factor
-1(2x(2x-5)+(-5)(2x-5))=0
reverse distribute, remember that ab+ac=a(b+c)
-1(2x-5)(2x-5)=0
set equal to 0
2x-5=0
2x=5
x=5/2

there is 1 real solution which is 5/2

Answer from: Quest

answer: get more recipes with 3 magazines for $20! i often use chicken broth instead of water. 3 tablespoons butter, divided; 1/2 cup freshly grated parmigiano-reggiano bring water and salt to a boil in a large saucepan; pour polenta slowly into 5 minutes to thicken; stir and taste for salt before transferring to a serving bowl.

Answer from: Quest

the camry sales+accord sale=828,000. to make it so the two numbers are 18 thousand apart and still equal 828,000, you first need to find out what half of 828,000 is. 828,000/2=414,000. for the two numbers to equal 828,000, you have to add the same amount as you subtract from the middle. in this case, the number is 9,000 because it's half of 18,000. to equal 828,000, you have to add 9,000 to 414,000 for the camry and subtract 9,000 from 414,000 for the accord. 414,000+9,000=423,000.

414,000-9,000=405,000.

423,000+405,000=828,000.

423,000-405,000=18,

hope it

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