Name
Alg1 Q4 Test 1 Review
3/30/07
Solving Quadratics
Due Monday: 4/2/07
1) x2 - 72 = 6x
2) -12x - 20 = x2
3) x2 - 23x = -132
4) 6x3 – 12x2 = 90x
5) 5x2 – 90x = 200
6) -20x2 + 600x = 20x3
7) x2 - 5x - 84 = 0
8) x2 + 11x = -28
9) x2 - 77 = -4x
10) x2 = 15x - 54
11) 3x2 + 15x = 108
12) x3 = x2 + 42x
13) -125x = 5x3 + 50x2
14) -72x = 12x2 + 108
15) 10x2 - 5x + 11 = 9x2 + x + 83
16) 4x2 + 3x - 12 = 6x2 - 7x – 60
17) 10x2 - 4x + 21 = 8x2 + 12x + 21
18) 7x2 - 3x - 15 = 11x2 + 13x - 15
Part II:
Write the quadratic formula for each problem:
1) 2x2 + 9x = -3
2) 3x2 – 7 = 4x
3) 8x2 = 7x + 5
4) 7x2 + 5 = 2x
5) 6x2 = 7x – 1
6) 2x2 - 9 = 3x
7) 5x2 – 4x = 2
8) 8x2 = 3x – 1
9) 7x2 + 5x = -6
10) 6x2 = x + 4
11) 3x2 + 6x = -2
12) x2 = 3x + 11
Answer Key:
1) x = {-6,12}
5) x = {-2,20}
9) x = {-11,7}
13) x = {-5,0}
17) x = {0,8}
Part II:
1) x = {-4.14,-.36}
5) x = {.16,1}
9) No Real Sol.
2) x = {-10,-2}
6) x = {-6,0,5}
10) x = {6,9}
14) x = {-3}
18) x = {-4,0}
3) x = {11,12}
7) x = {-7,12}
11) x = {-9,4}
15) x = {-6,12}
4) x = {-3,0,5}
8) x = {-7,-4}
12) x = {-6,0,7}
16) x = {-3,8}
2) x = {-1,2.33}
6) x = {-1.5,3}
10) x = {-.74, .90}
3) x = {-.47,1.34}
4) No Real Sol.
7) x = {-.35,1.15}
8) No Real Sol.
11) x = {-1.58,-.42} 12) x = {-2.14, 5.14}
I did the answer key very quickly (and I can’t type to save my life) so there might be an
error or two. If you are the 1st person to report an error... in person....in e014.... you get 3
points on the exam!