Question

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

Answer 1

Answer:

68

Step-by-step explanation:

Given is : 3x (4x -5) + 5

at x = 3

= 3*3 ( 4*3 - 5) + 5

= 9 ( 12 - 5 ) + 5

= 9* 7 + 5

= 63 + 5

= 68

Answer 2

Step-by-step explanation:

$given \: x = 3 \\ 3 x(4x - 5) + 5 \\ 12x {}^{2} - 15x + 5 \\ 12(3) {}^{2} - 15(3) + 5 \\ 12 \times 9 - 15 \times 3 + 5 \\ 108 - 45 + 5 \\ 113 - 45 \\ 68$

I hope it helps you........