Expert: Richard J. Raridon - 4/26/2011

Question
1. Solve: 2x^4 + 7x^2 - 4 = 0
2. Solve: (x^2 + 3)^2 - 6(x^2 + 3) = 7
3. Solve: 2t + 3 = 5√t
4. Simplify: 2/x - 5/x = 1
5. Simplify: √(4a^4)/ √(9b^3)
6. Simplify: The cube root of 250 minus the cube root of 128 plus the cube root of 16.
7. Simplify: (2√3 + 5)(4√3 - 3)  
8. Solve: 2√(x) + 3 = x
9. Find an equation y - k = a(x - h)2 for the parabola described:  vertex:  (-3,4);  x-intercept:  -1
10. If the parabola y - k = -3(x - 1)2 passes through the origin, find k.
11. If the parabola y + 5 = a(x + 2)2 has a y-intercept 4, find a.
12. Find values of a and k for a parabola containing the points given:  y - k = a(x + 3)2;  (-5,1) and (1,7)

Answer
Where are you getting these questions?  I just answered
1,2,3,5, 6,7,8 and 9 for AJ
1. x = +/-(1/2), +/-2i
2. x = +/-2
3. t = 1, 9/4
4. x = -3
5. 2a^2/(3b^3/2)
6. 3(2^1/3)
7. 14(3^1/2)
8. x = 9
9. y-4 = -(x+3)^2
10. k = 3
11. a = 9/4
12. a = 1/2