Question

Помогите пожалуйста (a-3)в квадрате-a(5a-6) пожалуйста с объяснением

Answer 1

(a-3)²-a(5a-6)=a²-6a+9-5a²+6a=-4a²+9 --------------------------

Answer 2

(а-3)^2-а*(5а-6) = а^2-6а+9-(5а^2-6а) = а^2-6а+9-5^2+6а =-4а^2+9

Answer 3

Solving the Equation (a-3)^2 - a(5a-6)

To solve the given equation (a-3)^2 - a(5a-6), we can follow these steps:

1. Expand the squared term (a-3)^2. 2. Simplify the expression by multiplying a with (5a-6). 3. Combine like terms and simplify the result.

Step 1: Expand the Squared Term

The squared term (a-3)^2 can be expanded using the formula (a-b)^2 = a^2 - 2ab + b^2.

Expanding (a-3)^2 gives us: (a-3)^2 = a^2 - 2 * a * 3 + 3^2

Step 2: Multiply a with (5a-6)

We need to multiply a with (5a-6), which gives us: a * (5a-6) = 5a^2 - 6a

Step 3: Combine Like Terms

Now, we can combine the terms from Step 1 and Step 2 to simplify the expression:

(a-3)^2 - a(5a-6) = (a^2 - 6a + 9) - (5a^2 - 6a)

Simplifying further: a^2 - 6a + 9 - 5a^2 + 6a = -4a^2 + 9

So, the simplified expression for (a-3)^2 - a(5a-6) is -4a^2 + 9.

Therefore, the result of the given expression (a-3)^2 - a(5a-6) is -4a^2 + 9.

Conclusion

The result of the expression (a-3)^2 - a(5a-6) simplifies to -4a^2 + 9.

I hope this helps! If you have any further questions or need additional assistance, feel free to ask.