Question

Class 8.....ex - 9.5.. question number 2... use the identity (X + a)(x + b) = x2 + +(a + b) x + ab to find the following products..... Question.(4x - 5)(4x + 5)​

Answer 1

Step-by-step explanation:

our answer is

16x^2 + (0)4x + (-25)

16x^2 - 25

Answer 2

Answer:

put a = -5

now {4x + (-5)} {4x+5}

by the given identity

(

$(4x) {}^{2} + { (- 5) + 5} \times 4x + (- 5) + \times 5 \\ 16 {x}^{2} + (- 25) \\ 16 {x}^{2} - 25$

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