Question

Using quadratic formula, find the roots of the following equations: x^2+3x_3=0, giving your answer correct to two decimal places​

Answer 1

Answer:

Given: x

2

−3(x+3)=0

x

2

−3x−9=0

Comparing x

2

−3x−9 with ax

2

+bx+c=0, we get

a=1,b=−3,c=−9

We know, x=

2a

−b±

b

2

−4ac

=

2×1

−(−3)±

(−3)

2

−4×1×(−9)

$

=

2

3±

9+36

=

2

3±

45

=

2

3±3

5

=

2

3±3×2.236

x=

2

3±6.708

x=

2

3+6.708

and

2

3−6.708

x=4.85 and −1.85

Step-by-step explanation:

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Answer 2

Answer:

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