CSU Math Placement Test with
complete Solutions
y = mx + b - ANSWER-slope-intercept form
m = (y₂- y₁) / (x₂- x₁) - ANSWER-slope formula
y - y₁ = m(x - x₁) - ANSWER-point slope form
Ax + By = C - ANSWER-standard form
d = √[( x₂ - x₁)² + (y₂ - y₁)²] - ANSWER-distance formula
(x - h)² + (y - k)² = r²
where (h,k) is the center and r is the radius - ANSWER-equation of a circle
|x| = { x if x >or= 0
{ -x if x < 0 - ANSWER-absolute value piece wise function
First, Outer, Inner, Last - ANSWER-FOIL
square root of -1 - ANSWER-what does i equal?
- 1 - ANSWER-i^2
- i - ANSWER-i^3
1 - ANSWER-i^4
x = -b ± √(b² - 4ac)/2a - ANSWER-quadratic formula
y = a(x - h)² + k - ANSWER-vertex form
(-b/2a , -b² - 4ac/4a) - ANSWER-vertex
i) (A^N)(A^M) = A^N+M
ii) (A^N)^M = A^NM
iii) (AB)^N = (A^N)(B^N)
iv) A^0 = 1
