lexinerd lexinerd

22-06-2014
Mathematics

contestada

Solve for x. 10x^2=29x-21 does anyone know this

Respuesta :

konrad509 konrad509

22-06-2014

[tex] 10x^2=29x-21 \\ 10x^2-29x+21=0\\ \Delta=(-29)^2-4\cdot10\cdot21=841-840=1\\ \sqrt{\Delta}=\sqrt1=1\\ x_1=\frac{-(-29)-1}{2\cdot10}=\frac{28}{20}=\frac{7}{5}\\ x_2=\frac{-(-29)+1}{2\cdot10}=\frac{30}{20}=\frac{3}{2}\\[/tex]

Answer Link

Otras preguntas

Two balls with charges +Q and +4Q are separated by 3R. Where should you place another charged ball Q0 on the line between the two charges such that the net forc

Which tab should a user click to access the Page Borders feature of Word? File

The Downhill Manufacturing company produces snowboards. The average life of their product is 10 years. A snowboard is considered defective if its life is less t

A cyclist rides at a constant speed, traveling 30 miles in 1.5 hours. Write a proportion that gives the number x of miles the cyclist rides in 4 hours.

From past experience, it is known 90% of one-year-old children can distinguish their mother's voice from the voice of a similar sounding female. A random sample

Roderick hits or kicks Edwin on the playground nearly every day. He also encourages other children to laugh at Edwin's attempts to kick a ball. Roderick is usin

63 student has to be 4 student in each group who won’t be in a group

You short sold 500 shares of Jasper stock at $41 a share at an initial margin of 60 percent. What is the highest the stock price can go before you receive a mar

Please look at the picture before answering! Name the angle that is an alternate exterior angle with Angle 6. A Angle 2 B Angle 6 C Angle 7 D Angle 4

How do you regard a flashing red light Select one: a. You must stop until it stops flashing b. Regard it as a stop sign come to a complete stop and proceed when