Question

-(3a-1)^2-(4-5a)(7-2a)-5a^2​

Answer 1

Решение:

-(3a-1)^2-(4-5a)(7-2a)-5a^2​

-(3a - 1)² - (4 - 5a)(7 - 2a) - 5a² = - (9a² - 6a + 1) - (28 - 8a - 35a + 10a²) - 5a² = -9a²+ 6a -1 -28 + 8a + 35a - 10a² - 5a² = -24a² + 49x -29

Answer 2

-(3a-1)²-(4-5a)(7-2a)-5a²=-(9а²-6а+1)-(28-8а-35а+10а²)-5а²=

-9а²+6а-1-28+8а+35а-10а²-5а²=-24а²+49а-29

Answer 3

To simplify the expression -(3a-1)^2 - (4-5a)(7-2a) - 5a^2, let's break it down step by step:

1. Expand (3a-1)^2: (3a-1)^2 = (3a-1)(3a-1) = 9a^2 - 6a + 1

2. Expand (4-5a)(7-2a): (4-5a)(7-2a) = 28 - 8a - 35a + 10a^2 = 10a^2 - 43a + 28

Now we can rewrite the expression with the expanded terms:

-(3a-1)^2 - (4-5a)(7-2a) - 5a^2 = - (9a^2 - 6a + 1) - (10a^2 - 43a + 28) - 5a^2

Next, distribute the negative sign throughout the expression:

= -9a^2 + 6a - 1 - 10a^2 + 43a - 28 - 5a^2

Now combine like terms:

= (-9a^2 - 10a^2 - 5a^2) + (6a + 43a) + (-1 - 28)

= -24a^2 + 49a - 29

Therefore, the simplified expression is -24a^2 + 49a - 29.