25) Simplify: 3x (4x – 5 )+ 3 and find its value for x = 3
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Answer:
3x3(4x3-5) +3
9(12-5) +3
9x7+3
63+3
69 ans.
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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
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