Science

Math

Humanities

... and beyond

Socratic Meta
Featured Answers

Topics

How do you solve the equation: $2 x^{2} + 15 x = 0$ $2x^2+15x=0$ ?

1 Answer

Jun 26, 2015

$x = 0$ $x=0$ or $x = - \frac{15}{2}$ $x=-15/2$

Explanation:

factor the left side of $2 x^{2} + 15 = 0$ $2x^2+15 =0$ to get
$XXXX$ $color(white)("XXXX")$ $(x) (2 x + 15) = 0$ $(x)(2x+15)=0$

Either
$XXXX$ $color(white)("XXXX")$ $x = 0$ $x=0$
or
$XXXX$ $color(white)("XXXX")$ $2 x + 15 = 0$ $2x+15 = 0$
$XXXX$ $color(white)("XXXX")$ which would imply
$XXXX$ $color(white)("XXXX")$ $XXXX$ $color(white)("XXXX")$ $x = - \frac{15}{2}$ $x=-15/2$

Related questions

See all questions in Comparing Methods for Solving Quadratics

Impact of this question

3590 views around the world

You can reuse this answer
Creative Commons License