Two of the steps in the derivation of the quadratic formula
are shown below.
which operation is performed in the derivation of the
quadratic-formula moving from step 6 to step 7?
- 400
step 6: 0'da = (x + )
-
x
+
40
20
subtracting
from both sides of the equation
step 7: 1762-40c =x+ b
2 a
20
squaring both sides of the equation
taking the square root of both sides of the equation
taking the square root of the discriminant