Question

4. Simplify 3x (4x – 5) + 3 and find its values for (i) x = 3 (ii)x=1/2​

Answer 1

Answer:

Step-by-step explanation:

3x(4x-5)+3

12x^2-15x+3

(i) For x=3

12(3^2)-15(3)+3

108-45+3

=66.

(ii) For x=1/2

12(1/2^2)-15(1/2)+3

12-7.5+3

=7.5

Answer 2

3x(4x-5)+3

if x=3

3(3)(3(4)-5)+3

9(12-5)+3

9(7)+3

63+3

=66

ifx=1/2

3(1/2)(4(1/2)-5)+3

3/2(2-5)+3

3/2(-3)+3

-9/2+3

-4.5+3

-1.5