Factorise (x2+4)−2a−a2−5.
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Step-by-step explanation:
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( x² + 4 ) - 2a - a² - 5 = (x + a + 1)(x - a - 1)
Given :
The expression ( x² + 4 ) - 2a - a² - 5
To find :
To factorise the expression
Formula :
- (a + b)² = a² + 2ab + b²
- a² - b² = ( a + b ) ( a - b )
Solution :
Step 1 of 2 :
Write down the given expression
The given expression is
( x² + 4 ) - 2a - a² - 5
Step 2 of 2 :
Factorise the expression
∴ ( x² + 4 ) - 2a - a² - 5 = (x + a + 1)(x - a - 1)
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