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2 years ago

What is the value of b2 - 4ac for the following equation? 2x2 + 3x = -1

2 answers:

7 0

The value of b^2-4ac is known as the discriminant of a quadratic function, and can tell you how many roots exist of this function depending on what it is equal to.

Start by moving the -1 to the other side, as we need this function to equal zero.

2x^2 + 3x + 1 = 0

This is now the standard form ax^2 + bx + c = 0. Plug each value that corresponds into the discriminant equation.

b^2-4ac
(3)^2 - 4(2)(1)
9 - 8
1

The value of the discriminant is 1, meaning that two real roots exist for the function described.

grandymaker [24]2 years ago

5 0

Answer:

Step-by-step explanation:

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VikaD [51]

Mode: 23

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2 years ago

Please Help! If you give the right answer I will rate you 5/5

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Answer: There are 104 silvery minnow population in the Rio Grande River.

Step-by-step explanation:

Since we have given that

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2 years ago

Use the Zero Product Property to find the x-intercepts for x^2+6x=y

Semmy [17]

Answer:

$x=0\ or\ x =-6$

Step-by-step explanation:

Given

$x^2+6x=y$

Required

Determine the x intercepts

To get the x intercepts, we simply set y to 0

Substitute 0 for y;

$x^2+6x=0$

Factorize:

$x(x +6) = 0$

Apply zero product property

$x=0\ or\ x + 6 =0$

$x=0\ or\ x =-6$

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2 years ago

56 is divided by a certain fraction a over B, the result is 1 fourth what is the fraction a Over b

Nonamiya [84]

14/56=1/4

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2 years ago

Please. I really need help in Algebra I. THE PICTURE GOES TO THE THIRD PROBLEM.

strojnjashka [21]

Answer:

1) 2x^2 -8x

2) 18x^2 -45x

Step-by-step explanation:

These problems make use of the distributive property. It tells you how you can use or eliminate parentheses as you may need.

a(b + c) = ab + ac . . . . . . . the outside factor multiplies each inside term

Of course, the usual rules of multiplication of positive and negative numbers apply. If the number of minus signs in a product is odd, the result is negative; otherwise the result is positive.

1. 2x(x -4) = (2x)(x) + (2x)(-4) = 2x^2 -8x

2. -9x(5 -2x) = (-9x)(5) + (-9x)(-2x) = -45x +18x^2 = 18x^2 -45x

3. She used the algebra tiles correctly.

The headers correctly represent -2x-2 and 2x-1
Each product has the correct sign (-- = +, -+ or +- = -)
Each product has the correct power of x

4 0

3 years ago

Read 2 more answers