Question

show that (4x-5)²+80x=(4x+5)​

Answer 1

Answer: 4x + 5)2 – 80x

              = [(4x)2 + 2(4x) (5) + (5)2] – 80x (Using identity II)

              = (16x2 + 40x + 25) – 80x

              = 16x2 + 40x – 80x + 25

              = 16x2 – 40x + 25

              = (4x)2 – 2(4x) (5) + (5)2

              = (4x – 5)2 (Using identity II)

                 = RHS

Answer 2

Step-by-step explanation:

see the attached image above....

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