haileyherrera haileyherrera

26-01-2021
Mathematics

contestada

Please help me with this I will give brainliest to one of the two who has the best answer. Thank you!

Please help me with this I will give brainliest to one of the two who has the best answer Thank you class=

Respuesta :

adedamolaogunlela adedamolaogunlela

26-01-2021

Answer:

Step-by-step explanation:

(3a-7)²=(3a-7)(3a-7)

= 9a²-21a-21a+49

= 9a²-42a+49

Therefore the error in that answer is -42a was replaced with -21a.

Answer Link

joshkbrown joshkbrown

28-01-2021

Answer:

(3a-7)²=(3a-7)(3a-7)

= 9a²-21a-21a+49

= 9a²-42a+49

Step-by-step explanation:

Answer Link

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