Mathematics, 12.07.2019 14:00 danniuhrig

El cuadrado de un número menos 5 es igual a 220. ¿cuál es ese número? el cuadrado de un número mas el mismo número es igual a 306. ¿cuál es ese número?

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Answer from: kiwipup16

the question is English is

Part a) The square of a number minus 5 equals 220. What is that number?

Part b) The square of a number plus the same number equals 306. What is that number?

Part a) The square of a number minus 5 equals 220. What is that number?

Let

x--------> the number

we know that

$x^{2} -5= 220 \\ \\ x^{2}= 220+5 \\\\x^{2} =225 \\\\x=\sqrt{225} \\ \\x=15$

therefore

the answer Part 1) is

the number is 15

Part 2) The square of a number plus the same number equals 306. What is that number?

Let

x--------> the number

we know that

$x^{2} +x= 306$

using a graph tool------> to resolve the second order equation

see the attached figure

the solution are

x=-18

x=17

Check

for x=-18

$(-18)^{2} +(-18)= 306 \\ 306=306$

for x=17

$(17)^{2} +(17)= 306 \\ 306=306$

therefore

the answer Part 2) is

the numbers are -18 and 17

The answer in Spanish

Parte a)

Hagamos

x--------> el numero

Sabemos que

$x^{2} -5= 220 \\ \\ x^{2}= 220+5 \\\\x^{2} =225 \\\\x=\sqrt{225} \\ \\x=15$

por lo tanto

La respuesta de la parte 1) es

El numero es 15

Parte 2)

Hagamos

x--------> El numero

Sabemos que

$x^{2} +x= 306$

Usamos una herramienta grafica------> para resolver la ecuacion cuadratica

Ver la imagen adjunta

Las soluciones son

x=-18

x=17

Chequeamos

para x=-18

$(-18)^{2} +(-18)= 306 \\ 306=306$

para x=17

$(17)^{2} +(17)= 306 \\ 306=306$

por lo tanto

La respuesta de la parte 2) es

Los numeros son -18 and 17

El cuadrado de un número menos 5 es igual a 220. ¿cuál es ese número? el cuadrado de un número mas

Answer from: kaitlynauito75

Im translating this to english, hope this is not a problem for you :)

"El cuadrado de un número menos 5 es igual a 220. ¿Cuál es ese número?"

This says that a number square subtracted by 5 is equal to 220:

n^2 - 5 = 220

now we need to isolate n:

n^2 = 225

n = √225 = 15

then our number is 15.

"El cuadrado de un número mas el mismo número es igual a 306. ¿Cuál es ese número?"

The sum betwen a squared number and the same number is equal to 306, and we want to find this number:

n^2 + n = 306

this is a cuadratic equation, here we can use Bhaskara:

n^2 + n - 306 = 0

if we have a equation of the form:

$ax^{2} + bx + c = 0$

the solutions are:

$x = \frac{-b +/- \sqrt{b^{2} -4ac } }{2a}$

in this case; a = 1, b= 1 and c = 306, we can replace this in the equation and get:

$n = \frac{ -1 +/- \sqrt{1 +4*1*306} }{2} = \frac{-1 +/-\sqrt{1225} }{2} = \frac{1 +/- 35}{2}$

So we have two solutions here; n = -36/2 = - 18 and n = 34/2 = 17

Answer from: Quest

the monthly balance will be $75,000

Answer from: Quest

there has been genes found in the x chromosome of males that have been linked to [homo/hetero]sexuality. in addition to the reign of the x chromosome, a section of chromosome 8 has also been link to, "alot of ppl are so " these facts were proven true after a 2014 study of a gay male and his strait brother. according to newscientist.com,"chromosome 14 and is mainly active in the thyroid, but also the brain. called tshr, it makes a type of receptor protein that recognises and binds to a hormone that stimulates the thyroid. in this way, the gene plays an important role in controlling thyroid function. the fact that tshr seems to be involved in sexual orientation fits with evidence that thyroid function seems to be linked to sexuality."

in conclusion, "ppl are so gay" due to their genetics.