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
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Answer:
5 whole number, 5/7
Step-by-step explanation:
10 ÷ 1 3/4
10 ÷ 7/4
10 x 4/7
40/7 or 5 5/7
