F(2)=42(2)-100
f(2)= -16
f(2)/-16= -8
The equation 0 = -2x2 5x - 3 was the quadratic formula that Zacharias used. However, he started substituting as:
Quadratic formula as x = ; substitution as x
The errors he made: he mistakenly used the negative (-) and postive (+)
* -5 should have been 5
* 52 should have been -52
* both the numerator and the denominator should have been -2 instead of 2
8/12 and 9/12. Respectively.
3(5-2)
3x3 = 9
the answer is 9
