Step-by-step explanation:
2x²-3x-4=0
sum
formula
- b/a
substitute
- -3/2
=3/2
product
c/a
-4/2
=-2
2x²-5=0
do the same
-0/2
=0
=-5/2
x²-3/5x+5=0
- -3/5 /1
=3/5
5/1
=5
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Answers & Comments
Step-by-step explanation:
2x²-3x-4=0
sum
formula
- b/a
substitute
- -3/2
=3/2
product
c/a
substitute
-4/2
=-2
2x²-5=0
do the same
sum
-0/2
=0
product
=-5/2
x²-3/5x+5=0
sum
- -3/5 /1
=3/5
product
5/1
=5