Question

Find the coffiecient of x square in (x-4) whole square

Answer 1

(x-4)^2 = x^2 - 8x + 16

coefficient of x^2 = 1

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Answer 2

Given that,

$⟹ {(x - 4)}^{2}$

It is in the form of (a - b)²

• (a - b)² = a² +b² - 2ab

$⟹ {(x)}^{2} + {(4)}^{2} - 2(x)(4) \\ ⟹ {x}^{2} + 16 - 8x$

∴ The coffiecient of x² is ″ 1 ″.

Step-by-step explanation:

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