Question

(4x+5) (4x-5) using suitable property

Answer 1

Answer:

Step-by-step explanation:

(x + a) (x + b) = x² + (a+b) x + ab

(4x -5) (4x - 1) = (4x)² + (-5 -1) 4x +  (-5 × -1)

                       = 16x² -24x +5

hence solved....

Answer 2

Answer:

4²-5² [(a+b)(a-b) =a²-b²]