riiahh22
20.08.2019 •
Mathematics
Which of the following equations has both 1 and −3 as solutions?
a. x2 – 2x – 3 = 0
b. x2 + 2x – 3 = 0
c. x2 – 4x + 3 = 0
d. x2 + 4x + 3 = 0
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Ответ:
factor
(x+3) (X-1)=O
set each factor to 0
x+3=0
x= -3
x-1=0
x=-1
therefore b is the correct answer
hope this helps
Ответ: