10 - Equations / Inequalities Flashcards
1
Q
What would this be an example of and what would the expanded version not contain?
(x + n)(x - n)
A
Difference of two squares.
once expanded there is no bx value
2
Q
When how would you represent x ≤ 8 and x < 8 on a number line
A
They would both be arrows going from 8, backwards. ≤ would have a filled in circle, < would have an empty circle.
3
Q
When a simultaneous equation features x² + y² =
what do you do?
A
You rearrange the other to make either x or y the subject and substitute that in
4
Q
What is the quadratic formula?
A
(b² ± √(b² - 4ac) ) / 2a
5
Q
How do you complete the square?
A
I dont really know tbh can someone pls help??
