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astra-53 [7]
3 years ago
8

42. Error Analysis Describe and correct the error made

Mathematics
1 answer:
SashulF [63]3 years ago
3 0

Answer:

(3x + 7)(3x - 7)

Step-by-step explanation:

9x² - 49 ← is a difference of squares and factors in general as

a² - b² = (a + b)(a - b) , then

9x² - 49

= (3x)² - 7²

This is where the error has been made in that 9x has been used instead of 3x

= (3x + 7)(3x - 7) ← in factored form

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