Question

Factorise :

1) x²-3+7
2) 4x²+4x+1
3)x²+0.9x-0.36
4)16-7x²-79
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Answer 1

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Step-by-step explanation:

1 ) x square - 3+7

x square +4

It cannot be factorise

2 )( 2x + 1 ) ka whole square