Question

111) What is sum of roots of following equation x2-13x +42=0
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Answer 1

Answer:

-13

Step-by-step explanation:

x^2+13x+42

x^2+7x+6x+42

x(x+7)+6(x+7)

(x+7)(x+6)

x=-7

x=-6

The sum of 2 roots is -7-6=-13

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