Question

Решите -3(2а-б)+5(б+а) при а= -1 б=6

Answer 1

-3(2а- b)+5(b+a)= -6a+3b+5b+5a=8b-a

подставляем значения:

8×6-(-1)=48+1=49

Answer 2

To solve the expression, simply substitute the given values of а and б into the expression and perform the calculations step by step:

Given: а = -1, б = 6

Expression: -3(2а - б) + 5(б + а)

Now, substitute the values:

-3(2(-1) - 6) + 5(6 + (-1))

Simplify further:

-3(-2 - 6) + 5(5)

Now calculate inside the parentheses:

-3(-8) + 5(5)

Perform multiplication:

24 + 25

Finally, add the two terms together:

49

So, the value of the expression when а = -1 and б = 6 is 49.