Question

In which line is a mistake first made when solving the quadratic equation using the quadratic formula? 4s2 + 100 = 40s Line 1 4s2 - 40s + 100 = 0 Line 2 s2 - 10s + 25 = 0 Line 3 s equals fraction numerator negative 10 space plus-or-minus space â 102 minus 4 left parenthesis 1 right parenthesis left parenthesis 25 right parenthesis over denominator 2 left parenthesis 1 right parenthesis end fraction Line 4 s equals fraction numerator negative 10 space plus-or-minus space 0 over denominator 2 end fraction Line 5 s = -10 / 2 Line 6 s = -5

Answer 1

Line 3.

Explanation:

The mistake is in line 3.

' s equals fraction numerator negative 10'.

It should be - (-10) = 'positive 10'.