Algebra
QUADRATIC EQUATIONS
Step 3.
Check the roots.
4x2
2
x2
7x
4
1
3
2
2
1
3
2
7
1
3
4
1
9
2
1
9
7
3
4
9
18
9
1
9
21
9
22
9
22
9
and,
4x2 + 2 = x2 - 7x
4(-2)2 + 2 = (-2)2 - 7(-2)
4(4) + 2 = 4 -(-14)
16 + 2 = 4 + 14
18 = 18
Thus, the roots check.
Rev. 0
Page 27
MA-02
