Sunday

September 21, 2014

September 21, 2014

Posted by **Sarah** on Thursday, November 12, 2009 at 10:15pm.

Solve the equation. Express the answer in simplest radical form.

-x^2-7x=-11

Please Help!!!! Thanks.

- trigonometry -
**Reiny**, Thursday, November 12, 2009 at 10:20pm-x^2-7x=-11

x^2 - 7x = 11

x^2 - 7x +**49/4**= 11 +**49/4**

(x - 7/2)^2 = 44/4 + 49/4

x - 7/2 = ± √93/2

x = (7 ±√93)/2

- trigonometry -
**Sarah**, Thursday, November 12, 2009 at 10:24pmThank you so much, but I was wondering:

-x^2-7x=-11

x^2 - 7x = 11

You have to divide by -1, wouldn't it be positive 7x.

- trigonometry -
**Reiny**, Thursday, November 12, 2009 at 10:25pmYOU ARE RIGHT!

good for you for catching that.

I am sure you can make the necessary changes.

(there is one small change)

- trigonometry -
**drwls**, Thursday, November 12, 2009 at 10:27pmThis is not a trigonometry question.

x^2 + 7x + (7/2)^2 = 11 + (7/2)^2

(x + 7/2)^2 = 23 1/4

x = -7/2 +/- sqrt(93)/2

- trigonometry -
**Sarah**, Thursday, November 12, 2009 at 10:30pmThank you so much!!!!

Could you please help me with another type of trig math question. I greatly appreciate your help.

**Answer this Question**

**Related Questions**

trigonometry - Complete the square to Solve Quadratic Equation: Solve the ...

math - x^2= 6x+11 solve the quadratic equation for values of x expressed in ...

MATH - solve 1-(2/x)=2/(x+2) Express your answer in simplest radical form. What ...

algebra 2 - Would some one look at these problems and see if I got them right ...

algebra - 1)Solve by factoring:5x^2=4-19x answer=-4,1/5 2)Which quadratic ...

Algebra - Solve the equation. Leave answer in simplest radical form. n^2-2n+1=5

Math - 1)Write a quadratic equation with integer coefficients that has -4+7i(...

Algebra - I have some problems that I am having trouble with and I have some ...

Algebra - Can someone verify if my answers are correct? Solve. 1/x+6-1/x-6 My ...

math,correction - Problem 22 Solve each quadratic equation by completeling the ...