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Igoryamba
3 years ago
12

Consider the quadratic equation x2 − 6x = 16.

Mathematics
1 answer:
e-lub [12.9K]3 years ago
8 0

Answer:

  1. C) (x − 3)2 = 25
  2. C) Factor out 4 from 4x2 + 40x.

Step-by-step explanation:

1. Adding the square of half the x-coefficient to both sides of the equation will "complete the square." That square is 9, so the result on the right is 16+9 = 25. Only selection C matches.

___

2. To complete the square, you want to be able to put the quadratic into the form a(x -h)^2 = -k. For the purpose, it is most convenient to first factor "a" from the given quadratic. Then you can determine "-h" to be half the x-coefficient inside the parentheses.

Here, that looks like ...

  4(x² +10x) = 80 . . . . . . . . . . step 1: factor out 4

  4(x² +10x +25) = 180 . . . . . add 25 inside parentheses and the same number (4·25) on the right side of the equation

  4(x +5)² = 180 . . . . . . . . . . . written as a square

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Can someone help Idk how to any of it
mezya [45]

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Step-by-step explanation:

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5 0
3 years ago
Simplify completely the quantity 5 times x to the third power plus 10 times x to the 2nd power plus 15 times x all over 5 times
dedylja [7]
The <u>correct answer </u>is:

x²+2x+3.

Explanation:

\frac{5x^3+10x^2+15x}{5x}

We need to divide each term of the numerator by the denominator.  For the <u>first term</u>:
\frac{5x^3}{5x}

Dividing the coefficients, we have 5/5 = 1.  
When dividing the variables, we use the quotient rule:  when dividing powers that have the same base, subtract the exponents.  This gives us:
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For the first monomial, this gives us 1x² = x².

The <u>second term</u>:
\frac{10x^2}{5x}

Dividing the coefficients, we have 10/5 = 2.
Dividing the variables, we again use the product rule:
x²/x = x²/x¹ = x²⁻¹ = x¹ = x

Together this gives us 2x.

The <u>third term</u>:
\frac{15x}{5x}

Dividing the coefficients, we have
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7 0
3 years ago
Read 2 more answers
The solution of a+b&gt;-4 is a &gt; -9. What is the value of b?
murzikaleks [220]

Answer:

3>b

Step-by-step explanation:

a+b>-4

a>-9

so a is greater than -9

so which means -7,-8,-6 is greater -9.

-7+b>-4

-7+4>-b

-3>-b

3>b

verification

a+b>-4

Substitute -7 for a

substitute 3 for b

-7+3>-4

the answer will be -4 which is correct.

4 0
3 years ago
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