Friday

March 6, 2015

March 6, 2015

Posted by **gabriel** on Tuesday, June 8, 2010 at 8:42am.

4x^2 - 5x = -2

can you show me the correct answer and how do it please

- algebra -
**MathMate**, Tuesday, June 8, 2010 at 10:00amI would use the standard quadratic formula for ax²+bx+c=0, and

x=(-b±√(b²-4ac))/2a

Here

4x^2 - 5x = -2

can be rewritten as

4x^2 - 5x + 2 =0, so

a=4,

b=-5

c=2

substituting in the quadratic formula,

x=(-(-5)±√((-5)²-4(4)(2)))/(2*4)

which when simplified, gives

x=(5±(√7)i)/8 where i=√(-1) (complex root).

Complex numbers is a little beyond high school, but the procedure is the same.

If you are not expecting complex roots, you may want to recheck if the question you posted was correct. If not, repeat the exercise using the correct question.

- algebra -
**Rose**, Thursday, May 10, 2012 at 9:23pmusing the quadratic formula, how do you solve 2p^2 + 16p = -2p^2 + 3?

**Answer this Question**

**Related Questions**

Algebra - I was given this answers to a problems I solved but I do not ...

Algebra - I was given this answers to a problems I solved but I do not ...

algebra II - I'm quite clueless as to how to solve this. I know the quadratic ...

Math - Use the quadratic formula to solve each of the following quadratic ...

algebra - Solve the following equation: k2 + 4k = 0 By factoring and By using ...

Math - Algebra - A. Solve the following quadratic equations. Make sure to show ...

algebra - Solve the quadratic equation: 2x(squared)+6x+12=0 I know you have to ...

8th Grade Algebra - You know how to solve quadratic equations using algebra, ...

Algebra - Solve the quadratic equation. 3x^2-15x+18=0 I know that the formula to...

College Algebra - Solve the following equation in the complex number system x^4+...