Factorise x2 - 10x - 25-2 Marks-

We can express x2 nbsp;+ 10x + 25 as using a2 nbsp;+ 2ab + b2 nbsp;= (a + b)2 = (x)2 nbsp;+ 2 ( x)( 5) + (5)2 [1 Mark] = (x + 5)2 = (x + 5)(x 5) [1 ...

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Standard VIII

Mathematics

Factorisation by Common Factors

Factorise x2 ...

Question

Factorise x² + 10x + 25.
$[2 M a r k s]$

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Solution

We can express x² + 10x + 25 as using a² + 2ab + b² = (a + b)²

= (x)² + 2 ( x)( 5) + (5)²
$[1 M a r k]$
= (x + 5)²

= (x + 5)(x - 5)
$[1 M a r k]$

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Factorise x2 + 10x + 25. [2 Marks]

We can express x2 + 10x + 25 as using a2 + 2ab + b2 = (a + b)2 = (x)2 + 2 ( x)( 5) + (5)2 [1 Mark] = (x + 5)2 = (x + 5)(x - 5) [1 Mark]

Factorise x² + 10x + 25.
$[2 M a r k s]$

We can express x² + 10x + 25 as using a² + 2ab + b² = (a + b)²

= (x)² + 2 ( x)( 5) + (5)²
$[1 M a r k]$
= (x + 5)²

= (x + 5)(x - 5)
$[1 M a r k]$