Question

3) 3a ^ 2 * b - a * b ^ 2 + 2a ^ 2 * b - 6a * b ^ 2 + 9ab якшo a =0,2 , b = - 5 ;

Answer 1

Ответ:

-45

Объяснение:

Answer 2

To evaluate the expression 3a^2 * b - a * b^2 + 2a^2 * b - 6a * b^2 + 9ab when a = 0.2 and b = -5, we substitute these values into the expression and calculate the result.

Substituting a = 0.2 and b = -5, we have:

3(0.2)^2 * (-5) - 0.2 * (-5)^2 + 2(0.2)^2 * (-5) - 6(0.2) * (-5)^2 + 9(0.2)(-5)

Calculating each term:

3(0.04) * (-5) - 0.2 * 25 + 2(0.04) * (-5) - 6(0.2) * 25 + 9(0.2)(-5)

-0.6 * (-5) - 0.2 * 25 + 0.08 * (-5) - 1.2 * 25 - 0.9

3 + 5 - 0.4 - 30 - 0.9

8.6 - 0.4 - 30 - 0.9

-22.8

Therefore, when a = 0.2 and b = -5, the value of the expression 3a^2 * b - a * b^2 + 2a^2 * b - 6a * b^2 + 9ab is -22.8.