Question

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

Answer 1

3x(4x - 5) + 3

If x = 1/2,

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

3/2(-3) + 3

-9+6/2

-3/2

Answer 2

Step-by-step explanation:

3x(4x-5)+3

12x^2-15x+3

12x^2-12x-3x+3=0

12x(x-1)-3(x-1)=0

(x-1)(12x-3)=0

x=1,-3/12

x=1,-1/4

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