Simplify 3x(4x-5)+3 and find its values for x is equal to 3
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3 x ( 4x - 5 ) + 3 = 3
12x - 15 + 3 = 3
12x - 12 = 3
12x = 3 + 12
x = 15/12
x = 5/4 ➡ Answer
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3x(4x−5)+3=12x^2−15x+3
x=3 gives the value 12(9)−15×3+3
=108−45+3
=66
x=1/2 gives the value 12(1/4)−15×(1/2)+3
=3−7.5+3
= - 3/2
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