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Irina-Kira [14]
3 years ago
7

Find the number that should be added to the expression to make it a perfect square. k^2-5k

Mathematics
1 answer:
yuradex [85]3 years ago
6 0
(K-5/2)^2-25/4 is your answer
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50 points !!! please help
Archy [21]

Answer:

The answer simplifies to zero

Step-by-step explanation:

3 sqrt(128) - 2 sqrt(6) * 4 sqrt(3)

3 sqrt(128) - 8 sqrt(6*3)

3sqrt(128) - 8 sqrt(18)

3 sqrt(64*2) - 8 sqrt(9*2)

3 sqrt(64)sqrt(2) - 8 sqrt(9) sqrt(2)

3 * 8 * sqrt(2) - 8 * 3 * sqrt(2)

24 sqrt(2) - 24 sqrt(2)

0


7 0
3 years ago
Read 2 more answers
Find a polynomial with integer coefficients that satisfies the given conditions. R has degree 4 and zeros 3 − 3i and 2, with 2 a
dolphi86 [110]

Answer:

The required polynomial is P(x)=x^4-10x^3+46x^2-96x+72.

Step-by-step explanation:

If a polynomial has degree n and c_1,c_2,...,c_n are zeroes of the polynomial, then the polynomial is defined as

P(x)=a(x-c_1)(x-c_2)...(x-x_n)

It is given that the polynomial R has degree 4 and zeros 3 − 3i and 2. The multiplicity of zero 2 is 2.

According to complex conjugate theorem, if a+ib is zero of a polynomial, then its conjugate a-ib is also a zero of that polynomial.

Since 3-3i is zero, therefore 3+3i is also a zero.

Total zeroes of the polynomial are 4, i.e., 3-3i, 3_3i, 2,2. Let a=1, So, the required polynomial is

R(x)=(x-3+3i)(x-3-3i)(x-2)(x-2)

R(x)=((x-3)+3i)((x-3)-3i)(x-2)^2

R(x)=(x-3)^2-(3i)^2((x-3)-3i)(x-2)^2     [a^2-b^2=(a-b)(a+b)]

R(x)=(x^2-6x+9-9(i)^2((x-3)-3i)(x-2)^2

R(x)=(x^2-6x+18)(x^2-4x+4)                [i^2=-1]

R(x)=(x^2-6x+18)(x^2-4x+4)

R(x)=x^4-10x^3+46x^2-96x+72

Therefore the required polynomial is P(x)=x^4-10x^3+46x^2-96x+72.

3 0
3 years ago
6 383 to the nearest hundred ?
Art [367]

Answer:

6400 please leave brainliest

3 0
3 years ago
Read 2 more answers
Help me with quistion 1 and 2
Anit [1.1K]
The answer to number 1 is B
4 0
3 years ago
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I need help with this problem if anyone can help me.
nika2105 [10]
You do 7 times 2 in parentheses and then minus that by 6-4 in parentheses so it will look like this , (7times2) - (6-4) = 12
6 0
3 years ago
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