bellanaflaherty bellanaflaherty

23-01-2020
Mathematics

contestada

make a question similar to the one below:
for example:
Solve this quadratic equation: x^2 = 81

and then solve it and explain how you did it.

Respuesta :

ghanami ghanami

23-01-2020

Answer:

two solutions : 9 ; -9

Step-by-step explanation:

x²=81

means : x² - 81 =0 but 81 = 9²

use identity ; a² - b² = (a-b)(a+b)

x² -9² = 0 : (x-9)(x+9)=0

x-9=0 or x+9 = 0

x =9 or x = -9

Answer Link

Otras preguntas

How to graph the function. compare the graph with the graph of f(x)=x

The minute hand of a clock is 4 inches long. how far does the tipof the minute hand move in 20 minnutes?

How do you turn the fraction 5/12 into a decimal?

Stephen lent his friend $100 at a simple annual interest rate of 6%. How much interest will Stephen earn at the end of 3 years?

What would have happened if the US lost American Spanish war

Write the point-slope form of the line's equation satisfying the given conditions. then use the point-slope form of the equation to write the slope-intercep

I'm a bit confused on how to get x, the example doesn't make sense either.

A package of organic strawberries costs $1.50 while they are in season and $2.25 when they aren’t in season what is the percent increase?

Car X leaves Northtown traveling at a steady rate of 55 mph. Car Y leaves 1 hour later following Car X, traveling at a steady rate of 60 mph. Which equation c

Catherine is confronted by a man with a gun as she walks home from work one night. in this scenario, catherine’s _____ will prepare her body to run from the sit