Question

5a²b³+4(a-b) при a=-1/2 , b=-1​

Answer 1

1 действие 5•(-½)²•(-1)³= 5•¼•(-1)= -1,25

2 действие -1,25 + 4•[(-½)-(-1)]= -1,25+4•½= -1,25+2=0,75

Ответ: 0,75

Answer 2

To evaluate the expression 5a²b³ + 4(a - b) at the given values a = -1/2 and b = -1, simply substitute these values into the expression and perform the calculations step by step:

Given values: a = -1/2 b = -1

Expression: 5a²b³ + 4(a - b)

Substitute the values: 5(-1/2)²(-1)³ + 4(-1/2 - (-1))

Calculate the values inside parentheses and exponentials: 5(1/4)(-1) + 4(-1/2 + 1)

Perform multiplications and additions/subtractions: -5/4 - 2 + 4/2

Simplify the fractions: -5/4 - 2 + 2

Combine the terms: -5/4 - 2/1 + 8/4

Find a common denominator: -5/4 - 8/4 + 8/4

Combine the fractions: -5/4 - 8/4 + 8/4 = -5/4

So, the value of the expression 5a²b³ + 4(a - b) at a = -1/2 and b = -1 is -5/4.