Question

Solve x2+23x + 3 = 0 using factorisation method.

Answer 1

According to the Quadratic Formula, x , the solution for Ax2+Bx+C = 0 , where A, B and C are numbers, often called coefficients, is given by :

- B ± √ B2-4AC

x = ————————

2A

In our case, A = 1

B = -3

C = 3

Accordingly, B2 - 4AC =

9 - 12 =

-3

Applying the quadratic formula :

3 ± √ -3

x = —————

2

In the set of real numbers, negative numbers do not have square roots. A new set of numbers, called complex, was invented so that negative numbers would have a square root. These numbers are written (a+b*i)

Both i and -i are the square roots of minus 1

Accordingly,√ -3 =

√ 3 • (-1) =

√ 3 • √ -1 =

± √ 3 • i

√ 3 , rounded to 4 decimal digits, is 1.7321

So now we are looking at:

x = ( 3 ± 1.732 i ) / 2

HOPE THIS CLUE HELPS UH , DEAR

Answer 2

this is going to surely help you