CHECK IT
Solving by completing the square
1) x2 - 10x + 16 = 0
2) x2 + 6x + 5 = 0
3) x2 + 10x + 21 = 0
4) x2 + 4x -45 = 0
5) x2 - 2x - 3 = 0
6) x2 - 12x + 20 = 0
7) x2 - 6x - 7 = 0
8) x2 + 12x + 27 = 0
9) x2 - 4x + 4 = 0
10) x2 - 2x - 48 = 0
11) x2 - 10x - 11 = 0
12) x2 + 8x - 9 = 0
13) x2 + 8x - 33 = 0
14) x2 - 8x - 9 = 0
15) x2 + 12x = 0
16) x2 - 6x + 8 = 0
17) x2 + 12x + 35 = 0
18) x2 + 6x + 9 = 0
19) x2 - 2x - 24 = 0
20) x2 -12x = 0
21) x2 + 10x + 16 = 0
22) x2 - 4x -5 = 0
23) x2 + 2x -35 = 0
24) x2 + 4x - 21 = 0
25) x2 + 2x - 15 = 0
26) x2 +10x + 25 = 0
27) x2 - 8x + 12 = 0
28) x2 + 6x - 27 = 0
29) x2 + 8x + 15 = 0
30) x2 + 4x - 5 = 0
www.mathsbox.org.uk
CHECK IT
Solving by completing the square
1) x2 - 10x + 16 = 0
2) x2 + 6x + 5 = 0
3) x2 + 10x + 21 = 0
4) x2 + 4x -45 = 0
5) x2 - 2x - 3 = 0
6) x2 - 12x + 20 = 0
7) x2 - 6x - 7 = 0
8) x2 + 12x + 27 = 0
9) x2 - 4x + 4 = 0
10) x2 - 2x - 48 = 0
11) x2 - 10x - 11 = 0
12) x2 + 8x - 9 = 0
13) x2 + 8x - 33 = 0
14) x2 - 8x - 9 = 0
15) x2 + 12x = 0
16) x2 - 6x + 8 = 0
17) x2 + 12x + 35 = 0
18) x2 + 6x + 9 = 0
19) x2 - 2x - 24 = 0
20) x2 -12x = 0
21) x2 + 10x + 16 = 0
22) x2 - 4x -5 = 0
23) x2 + 2x -35 = 0
24) x2 + 4x - 21 = 0
25) x2 + 2x - 15 = 0
26) x2 +10x + 25 = 0
27) x2 - 8x + 12 = 0
28) x2 + 6x - 27 = 0
29) x2 + 8x + 15 = 0
30) x2 + 4x - 5 = 0
www.mathsbox.org.uk