CBSE Class 9 Answered
factorise: x^2 + x/4 - 1/8
Asked by | 29 Jun, 2013, 08:42: PM
Expert Answer
= x2 + (x/4) - (1/8)
=x2 + (x/4) +(1/64) -(1/64) -( 1/8) {using (x+a )2 = x2 + 2ax + a2 }
= [ x+ (1/8)]2 - (9/64)
= [ x + (1/8) + (3/ 8 ) ] [ x + (1/8) - (3/ 8 ) ] {using a2 - b2 = (a+b) (a-b) }
= (x+(4/8) ) ( x- (2/8) )
= ( x+ (1/2)) ( x- (1/4)) answer
Answered by | 29 Jun, 2013, 10:42: PM
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