Question

find the value of following expressions if a= 4; b=2
a) a ( 2a-b)​

Answer 1

Answer:

$a(2a + b) \\ given \: a = 4 \: b = 2 \\ so \: \\ a(2a + b) \\ = 4(2 \times 4 + 2) \\ = 4(8 + 2) \\ = 4(10) \\ = 40$

Answer 2

Answer:

24

Step-by-step explanation:

Place the values of a and b in the equation

a ( 2a-b):

4(2 x 4 - 2)

solve bracket:

4(8 - 2)

4 x 6

=24