Question

3a+4(a+3b)+5b³,если a=3,b=2​

Answer 1

Ответ:

Пошаговое объяснение:

$3a+4(a+3b)+5b^3=3a+4a+12b+5b^3=7a+12b+5b^3\\7*3+12*2+5*2^3=21+24+40=85$

Answer 2

To evaluate the expression 3a + 4(a + 3b) + 5b³ when a = 3 and b = 2, we substitute the given values into the expression and perform the calculations.

Substituting a = 3 and b = 2 into the expression, we have:

3(3) + 4(3 + 3(2)) + 5(2)³

Simplifying each term:

3(3) = 9

4(3 + 3(2)) = 4(3 + 6) = 4(9) = 36

5(2)³ = 5(8) = 40

Now we substitute these simplified values back into the expression:

9 + 36 + 40

Adding these values together:

9 + 36 + 40 = 85

Therefore, when a = 3 and b = 2, the expression 3a + 4(a + 3b) + 5b³ evaluates to 85.