maggie444 maggie444

21-03-2017
Mathematics

contestada

solve the equation
4x squared =121

A 2.75,-2.75
B 5.5,-5.5
C 11,-11
D 30.25,-30.25

Respuesta :

Favouredlyf Favouredlyf

01-11-2019

Answer:B

Step-by-step explanation:

4x2 =121

4x2-121=0

using the general formula

[-b( +/-) √b2-4ac]/2a

a=4, b= 0, c=-121

x= [0 ( +/-)√02-(4*4*-121)]/2.4

= ( +/-)√1936)/8 = ( +/-)5.5

x =5.5

x = -5.5

Answer Link

Otras preguntas

Write a system of linear inequalities to represent each graph.

Mercantilists believed that national military power could be achieved best by

i need the answer to this

Que es neologismos, préstamos y extranjerismos. Con concepto y ejemplos, en resumen

The area of a square mirror is 256 in^2. A rectangular mirror has a width the same as the square mirror's width. It's length is two inches longer than its width

Once a month, the bureau of ______ statistics calculates the consumer price index, which is a measure of the ______ consumers for a fixed basket of consumer

Maria made 7 2/3 pints of juice. She drank 5/6 pint of the juice and poured 3/4 of the remaining juice equally into 3 bottles. How much juice is in each bottl

Which expression is equal to 5^4 x 5^8 ? A: 5^12 B: 5^4 C: 5^2 D: 5^−4

Math question no Guessing and Please show work

Suppose someone throws a dart at this target. Assume the dart will hit the target, with all points equally likely to be hit. What is the probability, that a giv