Question

Evaluate ( 3x - 7)² by using proper identity

Answer 1

Answer:

Step-by-step explanation:

using identity (a+b)²= a²+2ab+b²

= (3x)²+2×3x×7+(7)²

= 9x²+42x+49

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Answer 2

(3x -7) ^2 == (3x)^2 + 7^2 - 2 * 3x * 7

==>> 9x ^2 + 49 - 42x

is your answer

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