Question

*The value of b² - 4ac for equation 3x² - 7x - 2 = 0 is …….*

1️⃣ 49
2️⃣ 0
3️⃣ 25
4️⃣ 73​

Answer 1

Answer:

4) 73

Step-by-step explanation:

a=3 b=-7 c = -2

b²-4ac= -7²-4(3)(-2)

=> 49+24

=> 73

Answer 2

The value of b² - 4ac for equation 3x² - 7x - 2 = 0 is 73

Given :

The equation 3x² - 7x - 2 = 0

To find :

The value of b² - 4ac for equation 3x² - 7x - 2 = 0 is

1️⃣ 49

2️⃣ 0

3️⃣ 25

4️⃣ 73

Concept :

General form of a quadratic equation is

ax² + bx + c = 0

The Discriminant of the quadratic equation is denoted by D and defined as

D = b² - 4ac

Solution :

Step 1 of 2 :

Write down the given Quadratic equation

Here the given Quadratic equation is

3x² - 7x - 2 = 0

Step 2 of 2 :

Find the value of b² - 4ac

3x² - 7x - 2 = 0

Comparing with the general equation ax² + bx + c = 0 we get

a = 3 , b = - 7 , c = - 2

So the required value

= b² - 4ac

$\sf = {( - 7)}^{2} - 4 \times 3 \times ( - 2)$

$\sf = 49 + 24$

$\sf = 73$

Hence the correct option is 4️⃣ 73

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