Question

Simplify 3x (4 x - 5) - 3 and find its values for (1) x = 3 (ii) x = 4y​

Answer 1

Answer:

1) 3x (4 x - 5) - 3

= 3×3(4×3-5)-3

= 9×7-3

= 60

2) 3x (4 x - 5) - 3

= 3×4y(4×4y-5)-3

= 12y(16y-5)-3

= 192y²-60y-3