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Solve the equation x^2 - 8x + 5 = 0 by completing the square

x²- 8x + 5 = 0 => (x²- 8x + 16) - 11 = 0 =>(x - 4)² = 11 =>x - 4 = +- sqrt(11) =>x = 4 +- sqrt(11)

Answered by Dom H. • Maths tutor

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how am I meant to solve sq.root(6^2+8^2) = cube.root(125a^3) when one side is squared and the other is cubed?

Find max point of y=-x^2-5x-10

The width of a rectangle is X cm.  The length is 1·5 cm more than the width.  The perimeter of the rectangle is 17 cm. Write down an equation satisfied by X  and solve it to find X.

Simplify fully {x^2 -3x -4}/{x^2 + 4x +3}

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Solve the equation x^2 - 8x + 5 = 0 by completing the square

Related Maths GCSE answers

how am I meant to solve sq.root(6^2+8^2) = cube.root(125a^3) when one side is squared and the other is cubed?

Find max point of y=-x^2-5x-10

The width of a rectangle is X cm.  The length is 1·5 cm more than the width.  The perimeter of the rectangle is 17 cm. Write down an equation satisfied by X  and solve it to find X.

Simplify fully {x^2 -3x -4}/{x^2 + 4x +3}

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Solve the equation x^2 - 8x + 5 = 0 by completing the square

Related Maths GCSE answers

how am I meant to solve sq.root(6^2+8^2) = cube.root(125a^3) when one side is squared and the other is cubed?

Find max point of y=-x^2-5x-10

The width of a rectangle is X cm. The length is 1·5 cm more than the width. The perimeter of the rectangle is 17 cm. Write down an equation satisfied by X and solve it to find X.

Simplify fully {x^2 -3x -4}/{x^2 + 4x +3}

We're here to help

Company Information

Popular Requests

CLICK CEOP

MyTutor is part of the IXL family of brands:

IXL

Rosetta Stone

Wyzant

Education.com

Vocabulary.com

Emmersion

Thesaurus.com

Dictionary.com

SpanishDictionary.com

FrenchDictionary.com

Ingles.com

ABCya

© 2026 by IXL Learning

The width of a rectangle is X cm.  The length is 1·5 cm more than the width.  The perimeter of the rectangle is 17 cm. Write down an equation satisfied by X  and solve it to find X.