Question

3) For x =1. find the value of
x².5x+5​

Answer 1

Step-by-step explanation:

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10th

Maths

Quadratic Equations

Solutions of Quadratic Equations

If x^2 - 5x + 1 = 0 , then ...

MATHS

If x

2

−5x+1=0, then

x

5

x

10

+1

has the value

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ANSWER

x

2

−5x+1=0

∴x

2

+1=5x

∴x+

x

1

=5

∴x

2

+

x

2

1

=25−2=23

∴x

3

+

x

3

1

=(x+

x

1

)

3

−3(x+

x

1

)

∴x

3

+

x

3

1

=125−15

∴x

3

+

x

3

1

=110

Now (x

3

+

x

2

1

)(x

3

+

x

3

1

)=56×23

∴x

5

+x+

x

1

+

x

5

1

=110×23

∴x

5

+

x

5

1

=2530−5

∴x

5

+

x

5

1

=2525

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Answer 2

Answer:

10

explanation -

${x }^{2} \times 5x + 5 = x \times x + 5 \\ put \: the \: value \: of \: x \\ 1 \times 1 \times 5 \times 1 + 5 \\ 5 + 5 \\ 10.|$