How do you solve 3z ^ { 2} + 4z - 7= 0?
2 Answers
Apr 4, 2018
Explanation:
Using the quadratic equation
you get
Apr 4, 2018
1, and
Explanation:
Use shortcut when a + b + c = 0
Reminder of shortcut -->
-
When a + b + c = 0
x1 = 1 , andx2 = c/a
Example:y = 3x^2 + 4x - 7 = 0
x1 = 1 , andx2 = - 7/3 -
When a - b + c = 0.
x1 = - 1, andx2 = - c/a
Example.y = 5x^2 + 3x - 2x = 0
x1 = - 1 , andx2 = -c/a = 2/5