Question

Розкладіть на множники вираз 7a у квадраті відняти 42а додати 63

Answer 1

Ответ:

Хорошего тебе дня. ))))))))

Answer 2

Ответ:

7а²-42а+63=7(а²-6а+9)=7(а-3)²=7(а-3)(а-3).

Объяснение:

а²-2аб+б²=(а-б)².

Answer 3

I can help you with your math question. To factor the expression 7a^2 - 42a + 63, you need to find two numbers that multiply to 63 and add to -42. One possible pair of numbers is -21 and -3. Then you can write the expression as 7a^2 - 21a - 21a + 63, and group the terms as (7a^2 - 21a) - (21a - 63). Next, you can factor out the common factors from each group, which are 7a and -21, respectively. This gives you 7a(a - 3) - 21(a - 3). Finally, you can factor out the common factor of (a - 3) from both terms, and get (7a - 21)(a - 3) as the final answer. You can check your answer by expanding the factors and verifying that they match the original expression. For more information on how to factor expressions, you can visit [this website](https://ua.onlinemschool.com/math/assistance/number_theory/multiplier/) or [this one](https://www.houseofmath.com/uk/drill/rozkladannya-mnohochlena-na-mnozhnyky/rozkladannya-vyraziv-na-mnozhnyky). I hope this helps.