Thread: Quadratic Equations, Exam Tommorow.

I have a few problems that I'm trying to understand. If anyone can assist me that would be greatly appreciated.

Solve by using square root property:
1) 3(x-4)^2 = 15
2) (3x-4)^2 = 8


Solve by completing the square:
3) 2x^2 - 7x + 3= 0


Solve using the Quadratic Formula:
4) 3x^2 - 3x - 4= 0



Thank you.

Originally Posted by FactoringAnguish

I have a few problems that I'm trying to understand. If anyone can assist me that would be greatly appreciated.

Solve by using square root property:
1) 3(x-4)^2 = 15
2) (3x-4)^2 = 8

i'll do 1, do number 2..

Originally Posted by FactoringAnguish

Solve by completing the square:
3) 2x^2 - 7x + 3= 0

adding sides, we have



from here, continue.. just like in number 1.

Originally Posted by FactoringAnguish

Solve using the Quadratic Formula:
4) 3x^2 - 3x - 4= 0

Thank you.

if we have a quadratic poly of the form , then

so, a= 3, b= -3, c = -4.. do the substitution.. Ü

Thanks, makes perfect sense now that I see it worked out

Originally Posted by FactoringAnguish

I have a few problems that I'm trying to understand. If anyone can assist me that would be greatly appreciated.

Solve by using square root property:
1) 3(x-4)^2 = 15
2) (3x-4)^2 = 8


Solve by completing the square:
3) 2x^2 - 7x + 3= 0


Solve using the Quadratic Formula:
4) 3x^2 - 3x - 4= 0



Thank you.

You can get step by step help on solving any quadratic equation you want by factoring, completing the square, extracting square roots, and the quadratic formula at:

Free Online Quadratic Equation Solver: Solve by Factoring (or Factoring by Grouping)