Question

simplify 3x(4x-5)+3 and find its value for x=5​

Answer 1

3x(4x-5)+3

=12x²-15x+3

if x=5

12×5²-15×5+3

=12×25-75+3

=300-75+3

=303-75

=228

hope this helps you

Answer 2

Step-by-step explanation:

→ 3x(4x-5)+3

→ (3x × 4x) -(3x × 5) + 3

→ 12x² - 15x + 3

The value of 3x(4x-5)+3, when x = 5 is:-

→ 12x² - 15x + 3

→ (12 × 5²) - (15 × 5) + 3

→ (12 × 25) - 75 + 3

→ 300 + 3 - 75

→ 303 - 75

→ 228

Therefore, the value of 3x(4x-5)+3, when x = 5 is 228.