Candie521 Candie521

21-05-2014
Mathematics

contestada

Solve the following equation by transforming it into a perfect square trinomial.* 3x2 + 12x = 63

Respuesta :

21-05-2014

[tex]3x^2 + 12x = 63\\ \\3x^2+12x-63=0\\ \\3(x^2+4x-21)=0\\ \\3[x^2+4x+3x-3x-21] =0 \\ \\3[x^2+7x-3x-21] =0 \\ \\3[x(x +7 )-3(x+7)] =0[/tex]

[tex]3 (x +7 ) (x-3) =0 \\ \\x+7=0 \ \ \ or \ \ \ x-3 =0\\ \\x=-7 \ \ \ or \ \ \ x=3[/tex]

Answer Link

Otras preguntas

The probability of selecting a red ball at random from a jar that contains only red, blueand orange balls is 1/4. The probability of selecting a blue ball at ra

PHOTO INCLUDED Can someone pls help me with question 13? Much appreciated

Solve for base. Is anyone willing to help? Show the steps if you can.

Which of the following is a sentence fragment?

3(7x)-2(4-x) shhshsbdgsjjsjvshz

What is the slope of the line that passes through the points -1,-7 and -2 ,-5

why when I changed my display resolution on my laptop it made a vertical line on the screen?

Which of the following would provide the most effective dose of live and active bacterial cultures? A. 1 teaspoon of inulin B. 1 cup of yogurt C. 1 cup of tofu

how does the photograph enhance the information in the passage

Is the following true for all positive values of a and b: If a^2>b^2, then a>b