Respuesta :

Step-by-step explanation:

Given

(2x - 7) ²

We can see it is in the form of (a - b) ² so.

= (2x)² - 2 * 2x * 7 + 7²

= 4x² - 28x + 49

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Answer:

4x^2+28x+49

Step-by-step explanation:

(2x-7)^2

Use formula (a-b)^2=a^2-2ab+b^2

(2x)^2-2(2x)(-7)+(-7)^2

=4x^2+28x+49

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