Question

simplify 3x(4x-5)+3 and find its when x =3 and x=½​

Answer 1

Answer:

when x=3=>66

when x=1/2=>-3/2

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

$3x(4x - 5) + 3 \\ = (3 \times 3) \times (4 \times \frac{1}{2} ) + 3 \\ = 9 \times 2 + 3 \\ = 21$