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  • Use the identity (x + a) (x + b) = x 2 + (a + b) x + ab to find the following products. (ii) (4x+5)(4x+1)

Q : 2     Use the identity  (x+a)(x+b)=x^2+(a+b)x+ab   to find the  following products.

             (ii) (4x+5)(4x+1)

Answers (1)

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We use identity  (x+a)(x+b)=x^2+(a+b)x+ab
 In this a= 5 , b = 1 and x = 4x
                                             (4x+5)(4x+1)   =  (4x)^2+(5+1)4x+(5)(1)
                                                                                    = 16x^2+24x+5

Posted by

Gautam harsolia

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