Question

the product of 5a and (2a+3b) is
​

Answer 1

Answer:

10a²+15ab

Step-by-step explanation:

5a(2a+3b)

=5a(2a) +5a(3b)

=10a²+ 15ab

Answer 2

To find : product of $5a$ and $(2a + 3b )$

Solution :

• Multiplication is a process of repetitive addition of integers.

• Multiplication rules for integers :

1. If two negative integers are multiplied then the product obtained is positive integer. i.e. $(-) \times(-)=+$
2. If one negative and one positive integers are multiplied then the product obtained is negative integer. i.e. $(-) \times(+)=-$
3. If both positive integers are multiplied then the product obtained is positive integer. i.e. $(+) \times(+)=+$

• Therefore according to above rule we solve.

        $5a \times (2a + 3b ) \\10a^{2} + 15ab$

Hence, product of $5a$ and $(2a + 3b )$  is $10a^{2} + 15ab$ .