1.

Factorise: 2x2 /5x+5

Answer»

Here a= 2 and b= 3√5 and c= 5so D= b^2-4ac= 45-(40)= 5now we know that roots = -b(+-)√D/(2a)so roots will be -3√5(+-)√5/4

2x² + 3√5x + 5

=> 2x² + 2√5 x+ √5x+5 {< by using splinting method )

=> 2x( x +√5 ) + √5 (x +,√5)

=> (2x +√5)(x+√5) =0

=> x =-√5/2 and x =- √5 Answers ..


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