Question

7. Simplify 3(a^2 + ab - 1) + 5 - 2ab and find its value if a = 3 and b = 2.​

Answer 1

Answer:

35

Step-by-step explanation:

Since a=3 and b=2 we can plug in the values and solve the equation.

$3(a^{2} +ab-1)+5-2ab=\\3((3)^{2} +(3)(2)-1)+5-2(3)(2)=\\3(9+6-1)+5-2(6)=\\3(14)-7\\42-7=35$

Answer 2

Answer:

35

Step-by-step explanation:

Since a=3 and b=2 we can plug in the values and solve the equation.

\begin{gathered}3(a^{2} +ab-1)+5-2ab=\\3((3)^{2} +(3)(2)-1)+5-2(3)(2)=\\3(9+6-1)+5-2(6)=\\3(14)-7\\42-7=35\end{gathered}

3(a

2

+ab−1)+5−2ab=

3((3)

2

+(3)(2)−1)+5−2(3)(2)=

3(9+6−1)+5−2(6)=

3(14)−7

42−7=35