Question

what will get printed for a = 1, b = -4, C = 4

1)Roots are real and equal and are -2
2)Roots are real and are 2, 1
3)Roots are real and equal and are 2
4)Roots are imaginary and cannot be calculated​

Answer 1

Answer:

b

Step-by-step explanation:

thank you for the first time

Answer 2

Roots are real and equal and are 2.

Given,

The value of a = 1, b = -4, and c = 4.

To Find,

The nature and value of roots.

Solution,

To find the nature of roots we will calculate the discriminant.

D = b²-4ac

b²-4ac = (-4)²-4(1)(4) = 16-16 = 0

Hence, the roots are real and equal.

Now,

The formula for calculating the roots is

Roots = $\frac{-b+-\sqrt{D} }{2a}$

$\frac{-b+-\sqrt{D} }{2a}$ = -(-4)+-0/2(1) = 2,2

Hence, the correct answer is option (c) Roots are real and equal and are 2.