Rational number M. n is opposite to each other X. y is reciprocal to each other. The absolute value of Z is equal to 7. Find the value of 3M + 3N + 5Y + Z. who can help me

Rational number M. n is opposite to each other X. y is reciprocal to each other. The absolute value of Z is equal to 7. Find the value of 3M + 3N + 5Y + Z. who can help me

Rational number M. n is opposite to each other, so m + n = 0
x. Y is reciprocal to each other, so xy = 1
The absolute value of Z is equal to 7, so z = 7 or - 7
So 3M + 3N + 5xy + Z = 12 or - 2
You have the wrong number

The rational number m, n are opposite numbers, X and y are negative reciprocal of each other. The absolute value of Z is equal to 7. Find the value of 3M + 3N + 5xy + Z

On the contrary, X is the reciprocal of X, which is equal to zero,
∴m+n=0，xy=-1，z=±7，
∴3m+3n+5xy+z=3（m+n）+5xy+z
=3×0+5×（-1）+z
=-5+z，
When z = 7, 3M + 3N + 5xy + Z = - 5 + 7 = 2;
When z = - 7, 3M + 3N + 5xy + Z = - 5-7 = - 12
The value of 3M + 3N + 5xy + Z is 2 or - 12

If M and N are opposite numbers, the absolute value of Z is equal to 7. Find the value of 3M plus 3N plus Z

m=-n
z=+-7
3m+3n=3(m+n)=0
So 3N + 3N + Z = + - 7

The rational number m n is opposite to each other, x y is reciprocal to each other, and the absolute value of Z is 9. Find the value of the algebraic formula 3M + 3N + 5xy + Z-20

Because m n is opposite to each other, X and y are reciprocal, and the absolute value of Z is 9
So 3M + 3N = 0
5xy＝5
Z = 9 or - 9
So 3M + 3N + 5xy + Z-20
= - 6 or - 24

Simplify M / 3 root number 3N 2 / m * 2 root number 3M 2 / n

Solution: the original formula = m * radical M / (3 Radix 3) n * (2 Radix 3) m / Radix n = (3 / 2) m ^ 2 / N * radical (M / N)

Given 3m-n = 0, simplify the fraction of 2n-9m M2 + 3N

3m-n=0
So n = 3M
2n-9m parts m M2 + 3N
=（m^2 +9m）/(6m - 9m)
= m(m+9)/(-3m)
= - (m+9)/3
Yes, yes
What do not understand can continue to ask, at any time online

If M 3 + 3M 2 under the root sign = - M + 3 under the root sign, then the value range of M is?

√（m ³ + 3 m ²）= - m √（m + 3）
∴ √m²（m + 3）= - m√（m + 3）
M √ (M + 3) = - M √ (M + 3)
∴ m + 3 ≥ 0
m ≤ 0
∴ - 3 ≤ m ≤ 0

Given m = 5-radical 2, n = 5 + radical 6, find the value of 3M ^ 2-5mn = 3N ^ 2 I hope the experts who can do it come and have a look. I'm still waiting for my homework tomorrow

Original formula = 3 (25-10 √ 2 + 2) - 5 (25 + 5 √ 6-5 √ 2 - √ 12) + 3 (25 + 10 √ 6 + 6)
=81-30√2-125-25√6+25√2+10√3+93+30√6
=49-5√2+5√6+10√3

If a and B are rational numbers, and the root number is 12 + 1 / 6, the root sign 3 + the root sign 1 / 27 = a + B × root 2, then a = (), B ()

Root 12 + 1 / 6 root 3 + root 1 / 27 = root 3 (2 + 1 / 18 + 1 / 9) = 13 / 6 * root 3
It is impossible for a and B to be rational numbers to make the equation true
I think you have the wrong question

If a and B are rational numbers and the root number 12 plus 1 / 3 of the root sign plus the root number 16 is equal to a plus B times the root 3, find the value of a / b As the title

Because (root 12) + 1 / (root 3) + root 16 = a + b * root 3
2 (radical 3) + (radical 3) / 3 + 4 = a + B (radical 3)
Remove the denominator of the above formula and sort it out as follows:
7 root sign 3 + 12 = 3A + 3B * radical 3 - (1)
（1） Because a and B are both rational numbers, the comparison method of the same category of rational numbers and irrational numbers is applied
3a=12.a=4
3b root 3 = 7 root sign 3
3b=7
b=7/3
Therefore, a / b = 4 / (7 / 3) = 12 / 7
（2） According to formula (1), the following formula is obtained:
3A + 3B root number 3-7 root sign 3 = 12
3A + radical 3 (3b-7) = 12
In order to make a rational number, we have to eliminate the irrational term, that is, when 3b-7 = 0, B = 7 / 3, that is:
(root 3) * (3b-7) = 0, where 3A = 12, a = 4
Therefore, a / b = 4 / (7 / 3) = 12 / 7