3 years ago

What number would you add to both sides of x2 + 7x = 4 to complete the square?!...

Mathematics

2 answers:

maksim [4K]3 years ago

4 0

Answer:

The number that should be added on both sides is the square of half the coefficient of x. That is (7/2)²

Step-by-step explanation:

Nat2105 [25]3 years ago

3 0

Answer:

49/4 is the answer

Step-by-step explanation:

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Serggg [28]

The surface area increases by a factor of 4. 2^2= 4.
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The area of the long side is 6×2= 12cm^2 on the large prism.
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3 years ago

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Blababa [14]

Answer:

9,008

Step-by-step explanation:

67 + 12 = 79

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3 years ago

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If the equation y² - (K-<br>2y + 2k +1 = 0<br>with equal roots find the value of k

777dan777 [17]

Answer:

y² - (K- 2)y + 2k +1 = 0

equal roots means D=0

D= b^2 - 4ac

a=1, b= (k-2), c= 2k+1

so,

(k-2)^2 - 4(1)(2k+1) = 0

=> k^2 +4 - 8k -4 = 0

=> k^2 -8k = 0

=> k^2 = 8k

=> k= 8k/k

=> k = 8

Therefore the answer is k= 8

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3 years ago

I have 18 ones,15 hundreds,15 tens,and 8 thousands.what number am i?

antoniya [11.8K]

15818 ?? This is making me get a headache

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3 years ago

Use the x-intercept method to find all real solutions of the equation. x^3-9x^2+11x+21=0

IgorLugansk [536]

We must graph y=x^3-9x^2+11x+21. Please, see the attached file.
Then we see were the graph cuts the x-axis, and these values of x are the real solutions of the given equation:

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3 years ago