Question

Solve 2 a 2 − 5 a − 25 = 0 by factoring. Enter your answers below a = or a =

Answer 1

a=5, a=-2.5

Explanation:

Given:

`2 a^2 - 5 a - 25 = 0`

Solution:

`a_(1,\:2)=(-\left(-5\right)\pm √(\left(-5\right)^2-4\cdot \:2\left(-25\right)))/(2\cdot \:2)`

`a_(1,\:2)=(-\left(-5\right)\pm \:15)/(2\cdot \:2)`

`a_1=(-\left(-5\right)+15)/(2\cdot \:2),\:a_2=(-\left(-5\right)-15)/(2\cdot \:2)`

`a=5,\:a=-2.5`

~Lenvy~