Question

Найдите значение выражения -2a^3+5b^4 при а = 2 b = -3

Answer 1

-2*8+5*81= -16+405= 389

Answer 2

To find the value of the expression -2a^3 + 5b^4 when a = 2 and b = -3, you simply need to substitute these values into the expression and then perform the arithmetic calculations.

Let's do that step by step:

Step 1: Substitute the values of a and b into the expression. -2(2)^3 + 5(-3)^4

Step 2: Perform the exponentiation first. -2(8) + 5(81)

Step 3: Perform the multiplications. -16 + 405

Step 4: Perform the final addition. -16 + 405 = 389

So, the value of the expression -2a^3 + 5b^4 when a = 2 and b = -3 is 389.