Question

-4(a-b)+2(3a-b) при а- -1,5;b- -1

Answer 1

-4(a-b)+2(3a-b) при а- -1,5;b- -1 = -4а+4b+6a-2b = 6-4-9+2 = -5

Answer 2

-4 (-1,5-(-1))+2(3·(-1,5)-(-1));

-4(-1,5+1)+2(-4,5+1);

-4·(0,5)+2·(-3,5);

2-7= -5;

Answer 3

To evaluate the expression, substitute the given values of a and b into the expression -4(a-b) + 2(3a-b).

Given: a = -1.5 b = -1

Now, let's plug in these values:

-4(a - b) + 2(3a - b)

= -4((-1.5) - (-1)) + 2(3(-1.5) - (-1))

= -4(-0.5) + 2(-4.5 + 1)

= 2 + 2(-3.5)

= 2 - 7

= -5

So, the value of the expression -4(a-b) + 2(3a-b) when a = -1.5 and b = -1 is -5.