<u>the question is English is</u>
<u>Part a) </u>The square of a number minus 5 equals 220. What is that number?
<u>
Part b)</u> The square of a number plus the same number equals 306. What is that number?
<u>Part a) </u>The square of a number minus 5 equals 220. What is that number?
Let
x--------> the number
we know that

therefore
<u>the answer Part 1) is</u>
the number is 15
<u>Part 2)</u> The square of a number plus the same number equals 306. What is that number?
Let
x--------> the number
we know that

using a graph tool------> to resolve the second order equation
see the attached figure
the solution are
x=-18
x=17
<u>Check</u>
for x=-18

for x=17

therefore
<u>the answer Part 2) is</u>
the numbers are -18 and 17
<u>The answer in Spanish</u>
<u>Parte a) </u>
Hagamos
x--------> el numero
Sabemos que

por lo tanto
<u>La respuesta de la parte 1) es</u>
El numero es 15
<u>Parte 2)</u>
Hagamos
x--------> El numero
Sabemos que

Usamos una herramienta grafica------> para resolver la ecuacion cuadratica
Ver la imagen adjunta
Las soluciones son
x=-18
x=17
<u>Chequeamos</u>
para x=-18

para x=17

por lo tanto
<u>La respuesta de la parte 2) es</u>
Los numeros son -18 and 17