Sally1768 Sally1768
  • 03-08-2018
  • Mathematics
contestada

State the range of possible values for x if (3x+5)(x-1) < 2x+7

Respuesta :

sarajevo
sarajevo sarajevo
  • 03-08-2018

we are given with the inequality

[tex] (3x+5)(x-1) < 2x+7\\
\\
[/tex]

Open the parenthesis we get on left side we get

[tex] (3x+5)(x-1) < 2x+7 =3x^2-3x+5x-5<2x+7\\
\\
3x^2+2x-5<2x+7\\
\\
\text{Add -2x-7 on both the sides we get}\\
\\
3x^2+2x-5-2x-7<2x+7-2x-7\\
\\
3x^2-12<0\\
\\
\text{Add 12 on both the sides we get}\\
\\
3x^2<12\\
\\
\text{Divide both the sides by 3 we get}\\
\\
x^2<4\\
\\
-2<x<2\\ [/tex]

Answer Link

Otras preguntas

The diagram shows a patio in the shape of a rectangle. The patio is 3.6m long and 3m wide. Mathew is going to cover the patio with paving slabs. Each paving sla
What is the main idea of Truman's statement about the use of atomic weapons
When was the battle of Hastings?
Determine the half-life of potassium if in 3460 years a 200 g sample decayed into 25 g
How many light sources do you know Pls list them
Work out the number that is halfway between 27 times 38 and 33 times 38.Show your working out aswell.
In a sale, normal prices are reduced by 12% The sale price of a digital camera is £132.88 Work out the normal price of the digital camera (3marks)
In what respect does an atom of magnesium differ from a magnesium ion (Mg^{2+})? (A)The ion has a more stable electronic arrangement than the atom. (B)The pos
how are the themes and topics different
The sum of a number and 18 times its reciprocal is 11. Find the number(s). Let x represent the unknown number. The Reciprocal of x is____?