Question

-(-a-3b)^2+30ab+(4b-3a)^2 при a=-2,b=3

Answer 1

Ну как то так , думаю вам понравится

Answer 2

To find the value of the expression -(a+3b)^2 + 30ab + (4b-3a)^2 when a = -2 and b = 3, you need to substitute these values into the expression and then evaluate it.

Let's calculate it step by step:

1. Substitute a = -2 and b = 3 into -(a + 3b)^2: -( -2 + 3 * 3 )^2 = -( -2 + 9 )^2 = -( 7 )^2 = -49

2. Substitute a = -2 and b = 3 into (4b - 3a)^2: (4 * 3 - 3 * -2)^2 = (12 + 6)^2 = (18)^2 = 324

3. Substitute a = -2 and b = 3 into 30ab: 30 * -2 * 3 = -180

Now, add all three results together:

-49 + 324 - 180 = 95

So, when a = -2 and b = 3, the expression -(a+3b)^2 + 30ab + (4b-3a)^2 evaluates to 95.