Question

Using suitable identity (3x-7)(3x-7)​

Answer 1

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Here is your answer

$9x {}^{2 } - 42x + 49$

$(a - b) {}^{2} = a {}^{2} + b {}^{2} - 2ab$

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Answer 2

Answer:

(3x-7)(3x-7)=9x²-42x+49

Step-by-step explanation:

Given (3x-7)(3x-7)

= (3x-7)²

= (3x)²-2×(3x)×7+7²

/* By algebraic identity:

(a-b)² = a²-2ab+b² */

= 9x² - 42x + 49

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