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

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

                      (iii) (4x-5)(4x-1)​​     

Answers (1)

best_answer

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

Posted by

Gautam harsolia

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