Question

expand and simplify (2x-4) ^2 by using suitable identity​

Answer 1

Answer:

(2x-4) ^2

(2x)^2- 2×2×-4 +(-4)^2

4x2 +16-16

4x^2 is the correct answer

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

(2 x-4)²

we know that  (a-b)²=a²+b²-2 a b

(2 x-4)²=(2 x)²+4²- 2×2 x ×4

           = 4 x²+16-16 x

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