Question

4. If the discriminant of the equation 6x2-bx+2=0 is 1.then the
value of b is
O a) 7
O b) -7
O
c) Both a and b
O d) ✓7​

Answer 1

Answer:

C, both and b

Step-by-step explanation:

b2-4ac=1

b2-4*6*2=1

b2-48=1

b2=1+48=49

b2=49

b=root 49=+ or-7

Answer 2

Answer:

C) both a and b

Explanation :

As discriminant formula is =b^2-4ac

From verification of the options

If we take 7 in place of b the equation satisfies=b^2-4ac

7^2-4.6.2

49-24.2

49-48=1

Where as - 7 also correct as the b get squared

Otherwise we can do by like this also

b^2-4ac

b^2-4.6.2=1

b^2-48=1

b^2=49

b=±7

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