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1 vote
Write the quadratic equation in general form. What is the value of b2 - 4ac? 1 = 2x2 + 5x? 17 33 34

User Nickzam
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2 Answers

4 votes
2x² + 5x - 1 = 0 ← in general form

a=2, b=5, c=-1

b²-4ac = 5² - 4*2*(-1) = 25 + 8 = 33
User Ospr
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5 votes

Answer with explanation:

The given expression is:


1=2 x^2 + 5 x\\\\2 x^2 +5 x -1=0

is general form of the quadratic equation.

Of, the Quadratic expression of the type,


\rightarrow ax^2 + b x +c=0\\\\D{\Discriminant}=b^2-4 a c

For, the given Expression


D=(5)^2-4 * 2 * (-1)\\\\D=25 +8\\\\D=33

Option B: 33

User Zulko
by
7.5k points

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