Question

If the value of x=3 the find the value of 3x (4x-5)​

Answer 1

Answer:

63

Step-by-step explanation:

x=3

∴3x(4x-5)

=3[3](4[3]-5)

=9(12-5)

=9×7

=63.

Answer 2

Answer:

63

Step-by-step explanation:

3x(4x-5)

first, open brackets

12x^2 - 15x

substitute value of x

(12 × 9) - (15 × 3)

108 - 45

= 63